Sofaconventions - User contributions [en]

Sofaconventions:General disclaimer

2020-08-04T12:05:50Z

Ente: formatiert

;Website Owner
:The Acoustics Research Institute of the Austrian Academy of Sciences
: Wohllebengasse 12-14<br />
: A-1040 Vienna, Austria

; a research institute of the
:Austrian Academy of Sciences<br />
:Legal entity under the special protection of the Federal Republic of Austria (BGBl 569/1921 idF BGBl I 130/2003)<br />
:Dr. Ignaz Seipel-Platz 2, 1010 Vienna, Austria

This website informs about the scientific activities of the Austrian Academy of Sciences, thus following the mission of the Academy to promote the sciences and humanities in every respect and in every field.

User:Ente

2020-08-03T21:50:14Z

Ente: Ein Bild sagt mehr als tausend Worte.

[[File:Scary goose.jpg]]

User talk:Erpelstolz

2020-08-03T13:34:45Z

Ente: Welcome!

'''Willkommen bei ''Sofaconventions''!'''
Wir hoffen, dass du viele gute Informationen beisteuerst.
Möglicherweise möchtest du zunächst die [https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Contents Ersten Schritte] lesen.
Nochmal: Willkommen und viel Spaß! [[User:Ente|Ente]] ([[User talk:Ente|talk]]) 15:34, 3 August 2020 (CEST)

User:Erpelstolz

2020-08-03T13:34:45Z

Ente: Creating user page for new user.

Damit ich es nicht nur mit einem (bzw. zwei) Konten getestet habe, muss ich leider noch ein weiteres Konto anlegen.

User:Ente

2020-08-03T09:50:08Z

Ente:

Ducks Rule.

[[File:Scary goose.jpg]]

User:Ente

2020-08-03T09:50:00Z

Ente:

Ducks Rule.

[[File:Scary goose.jpg]]

[[File:testmiho.png]]

User:Ente

2020-08-03T09:29:12Z

Ente:

Ducks Rule.

[[File:Scary goose.jpg]]

File:Scary goose.jpg

2020-08-03T09:28:52Z

Ente: https://commons.wikimedia.org/wiki/File:Scary_goose.jpg Transferred from en.wikipedia to Commons by Maksim. The original description page was here. All following user names refer to en.wikipedia. Goose. Photo by sannse.

== Summary ==
https://commons.wikimedia.org/wiki/File:Scary_goose.jpg

Transferred from en.wikipedia to Commons by Maksim.
The original description page was here. All following user names refer to en.wikipedia.

Goose. Photo by sannse.

User:Ente

2020-08-03T09:27:15Z

Ente:

Ducks Rule.

[[File:SimpleFreeFieldHRIR-0.3.png|right|thumb|225px]]

User:Ente

2020-08-03T09:26:44Z

Ente: Created page with "Ducks Rule."

Ducks Rule.

User talk:Christian Gottschall

2020-08-03T08:48:35Z

Ente: Welcome!

User talk:Andresperezlopez

2019-06-04T19:36:13Z

Ente: Welcome!

User:Andresperezlopez

2019-06-04T19:36:13Z

Ente: Creating user page for new user.

Researcher at MTG/UPF and Eurecat (Barcelona).

User talk:Cvsonagiri

2019-06-04T19:35:52Z

Ente: Welcome!

User:Cvsonagiri

2019-06-04T19:35:52Z

Ente: Creating user page for new user.

Dr S.China Venkateswarlu is working as a professor in the Department of Electronics and Communication Engineering. He has 21 years of professional experience including 2.6 years in industry, about 19 years in teaching. He obtained his B.Tech (Electronics & Communication Engineering) degree from Acharya Nagarjuna University, Guntur, A.P. M.Tech(Digital Systems & Computer Electronics) from JNTUH, Hyderabad and PhD(Digital Signal Processing) from the JNTUK, Kakinada. In his career in Academia, he has held various positions such as Associate Lecturer, Assistant Professor, Associate Professor, Professor, Dean, Department Head and Principal. He has taught more than 25 Engineering subjects for UG/PG programmes. He is worked in Abroad as an Associate Professor in School of Electrical & Computing Engineering, from Adama Science & Technology University, Adama, Ethiopia. He has published more than 25 papers in National and International journals and conferences. He has reviewed one Book on Digital Signal Processing from M/S Persons Educations. He is a Life member of ISTE, CSI, SDIWC, and IAENG. He is working as a Reviewer in Different International Journals under EDAS. His areas of interest are Digital Signal Processing, Image and Speech Processing.
1. He has published Text Book on “Wavelet Hybrid Threshold and Window Functions for Speech Enhancement” from Lap_LAMBERT Academic Publishing: 978-613-9-89840-40.
2. Award for “Excellence in Research” from EET CRS 3rd South Asian Education Awards-2018 http://educationexpo.tv/southasianeducationawards.
3. Award for “Best Paper Award”, S.China Venkateswarlu, A.Subba Rami Reddy and .K.Satya Prasad Topic on “Speech Enhancement in Terms of Objective Quality Measures with Effect of Adjustable Window Shape Parameters”, from International Journal-WJTER, on December2017.INDIA. http://wjter.com/ .
4. Award for “Best Teacher Award” for Academic Year 2006-07, from CMRCET,Hyderabad.

SOFA (Spatially Oriented Format for Acoustics)

2013-07-19T20:28:48Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.
* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.
* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).
* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T19:06:23Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T19:04:05Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:58:27Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:56:58Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:54:35Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:53:20Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:51:18Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:49:56Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement]. ^

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:49:12Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

SOFA (Spatially Oriented Format for Acoustics)

2013-07-18T18:44:50Z

Ente:

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room [http://en.wikipedia.org/wiki/Impulse_response impulse responses] (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

SOFA has been proposed as a standard of the [http://aes.org Audio Engineering Society (AES)]. The standardization process ([http://www.aes.org/standards/meetings/init-projects/aes-x212-init.cfm X212]) is ongoing now and open for contributions.

The SOFA project got awarded with the Reproducibility in Audio and Music Research Prize 2013 [http://soundsoftware.ac.uk/rr-prize-winner-announcement].

People behind SOFA

2013-05-21T12:14:07Z

Ente: Protected "People behind SOFA" (‎[edit=sysop] (indefinite) ‎[move=sysop] (indefinite))

* '''[http://www.kfs.oeaw.ac.at/index.php?option=com_content&view=article&id=56:di-piotr-majdak&catid=13&Itemid=419 Piotr Majdak]''' ([http://www.kfs.oeaw.ac.at Acoustics Research Institute], [http://www.oeaw.ac.at/ Austrian Academy of Sciences]): project leader
* '''[http://www.aipa.tu-berlin.de/menue/team/hagen_wierstorf/parameter/en/ Hagen Wierstorf]''' ([http://www.t-labs.tu-berlin.de/ Telekom Innovation Laboratories], [http://www.tu-berlin.de/ Technical University of Berlin]): one of the project initiators, Octave support
* '''[http://www.kfs.oeaw.ac.at/index.php?option=com_content&view=article&id=293:mihocic-di-fh-michael&catid=13&Itemid=419 Michael Mihocic]''' ([http://www.kfs.oeaw.ac.at Acoustics Research Institute], [http://www.oeaw.ac.at/ Austrian Academy of Sciences]): Matlab support, website support
* '''Markus Noisternig''' ([http://www.ircam.fr/ UMR STMS IRCAM-CNRS-UPMC]): specifications, standardization
* '''Matthieu Parmentier''' ([http://www.francetelevisions.fr/ France Television]): standardization

SOFA was initiated in January 2012 during the 4th AABBA meeting in Berlin (Blauert, 2009). Since then, many other researches helped by providing feedback and support.

== Acknowledgments ==

* '''Rozenn Nicol''' ([http://laborange.fr/ Orange Labs, France Telecom])
* '''[http://steinhardt.nyu.edu/faculty_bios/view/Agnieszka_Roginska Agnieszka Roginska]''' ([http://steinhardt.nyu.edu/ Music Technology, New York University])
* '''[http://www.kfs.oeaw.ac.at/index.php?option=com_content&view=article&id=665:ziegelwanger-dipl-ing-harald&catid=13&Itemid=419 Harald Ziegelwanger]''' ([http://www.kfs.oeaw.ac.at Acoustics Research Institute], [http://www.oeaw.ac.at/ Austrian Academy of Sciences])
* '''[http://www.ais.riec.tohoku.ac.jp/Member/yoh/ Yôiti Suzuki]''' ([http://www.riec.tohoku.ac.jp/index-e.shtml Research Institute of Electrical Communication, Tohoku University])
* '''Kanji Watanabe''' ([http://www.akita-pu.ac.jp/language/EN/ Faculty of Engineering, Akita Prefectural University])

Also many thanks go to the '''AES standardization team''' for their support.

== Contact ==

If you have questions about SOFA, please send an email to the [mailto:sofacoustics-devel@lists.sourceforge.net mailing list]. You don't have to be a member of the mailing list to send a message to the list moderator.

== References ==
Blauert, J., Braasch, J., Bucholz, J., Colburn, H.S., Jekosch, U., Kohlrausch, A., Mourjopoulos, J., Pulkki, V., Raake, A. (2009) "Aural assessment by means of binaural algorithms - The AABBA project" in proceedings of the International Symposium on Auditory and Audiological Research (ISSAR), Helsingør, Denmark.

General information on SOFA

2013-05-21T12:13:41Z

Ente: Protected "General information on SOFA" (‎[edit=sysop] (indefinite) ‎[move=sysop] (indefinite))

== General ==

[http://en.wikipedia.org/wiki/Head-related_transfer_function Head-related transfer functions (HRTFs)] describe the spatial filtering of the incoming sound due to the listener's anatomy. [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] are crucially important for the binaural reproduction of virtual acoustics. [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] have been measured by a number of laboratories and are typically stored in each lab's native file format. While the different formats are of advantage for each lab, an exchange of such data is difficult due to incompatibilities between formats.

The '''spatially oriented format for acoustics (SOFA)''' aims at representing spatial data in a general way, allowing to store not only [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] but also more complex data, e.g., [http://en.wikipedia.org/wiki/Impulse_response directional room impulse responses] (DRIRs) measured with a multichannel microphone array excited by a loudspeaker array. In order to simplify the adaption of SOFA for various applications, examples of implementation of the format specifications are provided together with a collection of exemplary data sets converted to SOFA.

== Typical measurement setups ==

One of the first publicly available [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] were those of a [http://en.wikipedia.org/wiki/Dummy_head_recording dummy-head] microphone measured in an anechoic room [1]. Two microphones placed at the ear simulators were used for the recordings and one loudspeaker was used for the signal excitation. The loudspeaker was moved to the desired elevation and the mannequin was rotated to the desired azimuth. Taken together, [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] for 710 spatial positions were measured at elevations from -40° to +90° in steps of 10° and 360° azimuthal range in steps of 5° and a constant distance of 1.4 m. The [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] are provided as [http://en.wikipedia.org/wiki/Impulse_response impulse responses (IRs)] with the length of 512 samples at a sampling rate of 44.1 kHz.

One of the first publicly available [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] measured in human listeners was the CIPIC database [2]⁠. The measurements were performed at a constant distance of 1 m for 1250 spatial directions around the listener. The [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] are available for 43 listeners as IRs of 200 samples at a sampling rate of 44.1 kHz. Since then many other [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF]/DRIR databases have been made publicly available [3–8]⁠.

All those measurement setups have the following properties in common. In an anechoic chamber or in a room, excitation signals are generated and microphones are used to record the incoming signals (see Fig. 1). The measurement is repeated while varying the spatial position of the excitation source relative to the listener, which is done by varying the position of the listener, the sound source, or both in different dimensions.
Binaural [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF] measurement setups use only two microphones to record the left and right ear signals. However, [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF]/DRIRs measurements may also consider multiple microphones, e.g., three microphones per head side in hearing-assist devices [7]⁠, tens of microphones arranged in an array structure at different directions and distances from the center [9]⁠, a multichannel microphone array arranged around the listeners in a reciprocal [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF] measurement system [10], [11]⁠, multichannel microphone arrays for measuring DRIRs [12]⁠ or various microphone positions in a room, e.g., for concert-hall acoustics measurements [13]⁠. As a generalization, microphones and an object comprising those microphones can be identified. Thus, in this article, a microphone as the single receiver of the sound field is called the receiver, and the comprising all the receivers is called the listener, see Fig. 1.

The sound source used for the excitation signal is not necessarily a single point source. Loudspeaker arrays were used, either to control the sound field surrounding the listener, e.g., wave-field synthesis [11], [14], [15]⁠, or higher-order Ambisonics [16], [17]⁠ or to control the radiation characteristics of the sound sources [18]⁠. Similarly to the concept of listener and receivers, in this article, the particular sources creating the excitation signal are called emitters and the object comprising the emitters is called source. Note that a measurement setup with a source with multiple emitters and a listener with multiple receivers has already been considered [19]⁠.

In typical [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF] measurements, only the direction of the incoming signal is varied. In more recent setups also different sound-ear distances have been considered [4], [11], [20]⁠. However, sometimes the variation of other parameters is of interest. For example, [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] were measured as a function of the head orientation relative to the torso [21]⁠, or the room IRs were measured as a function of the room temperature [22]⁠. An [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF] file format should thus consider even such parameters.

== Aim of SOFA ==

While designing SOFA, we set up the following requirements:
* Description of a measurement setup with arbitrary geometry, i.e., not limited to special cases like a regular grid, or a constant distance;
* Self-describing data with a consistent definition, i.e., all the required information about the measurement setup must be provided as metadata in the file;
* Flexibility to describe data of multiple conditions (listeners, distances, etc) in a single file;
* Partial file and network support;
* Available as binary file with data compression for efficient storage and transfer;
* Predefined description conventions for the most common measurement setups.

[[SOFA Specifications]] aim at fulfilling all those requirements. In a nutshell, the measurement setup is described by various objects and their relations. The information is stored in a numeric container based on [[netCDF-4]]. We consider a measurement as a discrete sampled observation done at a specific time and under a specific condition. Each measurement consists of data (e.g., an [http://en.wikipedia.org/wiki/Impulse_response impulse response, IR]) and is described by its corresponding dimensions and metadata. All measurements are stored in a single data structure (e.g., a matrix of IRs). A consistent description of measurement setups are given by [[SOFA conventions]].

== Other existing data formats ==

Beside SOFA, [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] have been stored using different formats, all of them having advantages and disadvantages. The CIPIC database [2]⁠ provides a file per listener in either a plain text or Matlab (Mathworks, Inc.) file format. The directions are hard coded, i.e., the index of an [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] corresponds to a predefined direction used in the measurements. While the representation of [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] from other directions is not allowed, anthropometric data have been stored within that format. The openDAFF package1, while similarly storing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] only in a regular angular distance, uses a key-value system for the description of the metadata which seems to be very promising. Other databases such as LISTEN [3]⁠ and ARI [6]⁠, consist of an [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF] matrix and additional matrices describing the direction of the corresponding [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTF], thus, allowing to represent [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] from any direction. In that formats, [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] from each listener are stored in a separate file. In the database storing the [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] as a function of distance [4]⁠, the data are stored in a separate file for each distance. Combined with the necessity to store a separate file for each listener, those three latter formats would result in many files. The MARL-NYU database [23]⁠ harmonized the format of CIPIC, LISTEN, MIT, and others databases, and stores all those data in a single file. This concept seems to be promising when combined with a network interface and partial file access in the future. Most of those [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] are stored in Matlab formats, i.e., they use a Matlab file convention to store predefined matrices. In contrast, SDIF [24]⁠, a general format for storing audio-related data, has been adapted to [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] , allowing to store [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] of a single listener in a mixed text-based and binary representation. The concert-hall data [25]⁠, stored as compressed “.wav” files, are another example for a mixed-binary format, which further requires a description (separate text files) in order to being able to interpret the data. The [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs] measured in rooms (e.g., [8]⁠) are also Matlab files and the relationship between the data and the geometry of the measurement setup is provided in separate publications.

----

== References ==
[1] W. G. Gardner and K. D. Martin, “HRTF measurements of a KEMAR,” J Acoust Soc Am, vol. 97, pp. 3907–3908, 1995.

[2] V. R. Algazi, R. O. Duda, D. M. Thompson, and C. Avendano, “The CIPIC HRTF database,” in IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2001, pp. 99–102.

[3] O. Warusfel, “LISTEN HRTF database,” 2003. http://recherche.ircam.fr/equipes/salles/listen/.

[4] H. Wierstorf, M. Geier, A. Raake, and S. Spors, “A free database of head-related impulse response measurements in the horizontal plane with multiple distances,” in 130th Convention of the Audio Engineering Society (aes), 2011, ebrief 6.

[5] T. Nishino, S. Kajita, K. Takeda, and F. Itakura, “Interpolation of head related transfer functions of azimuth and elevation,” J Acoust Soc Jpn, vol. 57, pp. 685–692, 2001.

[6] P. Majdak, M. J. Goupell, and B. Laback, “3-D localization of virtual sound sources: effects of visual environment, pointing method, and training.,” Atten Percept Psychophys, vol. 72, pp. 454–69, 2010.

[7] H. Kayser, S.D.Ewert, J.Anemüller, T. Rohdenburg, V. Hohmann, and B. Kollmeier, “Database of multichannel in-ear and behind-the-ear head-related and binaural room impulse responses,” EURASIP J Advances Sig Proc, Article ID 298605, 10 pages, 2009.

[8] M. Jeub, M. Schäfer, and P. Vary, “A binaural room impulse response database for the evaluation of dereverberation algorithms,” in 16th International Conference on Digital Signal Proc, 2009, pp. 1–5.

[9] I. Balmages and B. Rafaely, “Open-sphere designs for spherical microphone arrays,” IEEE Trans Audio Speech Lang Proc, vol. 15, pp. 727–732, 2007.

[10] D. N. Zotkin, R. Duraiswami, E. Grassi, and N. A. Gumerov, “Fast head-related transfer function measurement via reciprocity,” J Acoust Soc Am, vol. 120, pp. 2202–2215, 2006.

[11] M. Pollow, M., Nguyen, K.-V., Warusfel, O., Carpentier, T., Müller-Trapet, M., Vorländer, M., and Noisternig, “Calculation of head-related transfer functions for arbitrary field points using spherical harmonics decomposition,” Acta Acust United Ac, vol. 89, pp. 72–82, 2012.

[12] B. Khaykin, D., and Rafaely, “Acoustic analysis by spherical microphone array processing of room impulse responses,” J Acoust Soc Am, vol. 132, pp. 261–270, 2012.

[13] T. Pätynen, J., Tervo, S., and Lokki, “Analysis of concert hall acoustics via visualizations of time-frequency and spatiotemporal responses,” J Acoust Soc Am, vol. 133, pp. 842–857, 2013.

[14] A. J. Berkhout, “Holographic approach to acoustic sound control,” J Audio Eng Soc, vol. 36, pp. 977–995, 1988.

[15] S. Ahrens, J., and Spors, “Wave field synthesis of a sound field described by spherical harmonics expansion coefficients,” J Acoust Soc Am, vol. 131, pp. 2190–2199, 2012.

[16] M. A. Gerzon, “Ambisonics. Part two: Studio techniques,” Studio Sound, vol. 17, pp. 24–26, 1975.

[17] M. Zotter, F., Pomberger, H., and Noisternig, “Energy-preserving ambisonic decoding,” Acta Acust United Ac, vol. 98, pp. 37–47, 2012.

[18] B. Rafaely, “Spherical loudspeaker array for local active control of sound,” J Acoust Soc Am, vol. 125, pp. 3006–3017, 2009.

[19] S. Clapp, A. Guthrie, J. Braasch, and N. Xiang, “The use of multi-channel microphone and loudspeaker arrays to evaluate room acoustics,” in Proceedings of the Acoustics, 2012, vol. 131, p. 3208.

[20] S. Hosoe, K. I. Takanori Nishino, and K. Takeda, “Development of micro-dodecahedral loudspeaker for measuring head-related transfer functions in the proximal region,” in Proceedings of the IEEE Conference on Audio, Speech and Signal Processing (ICASSP), 2006, pp. 329–332.

[21] M. Guldenschuh, A. Sontacchi, and F. Zotter, “HRTF modelling in due consideration variable torso reflections,” in Proceedings of the Acoustics’08, 2008, pp. 99–104.

[22] G. W. Elko, E. Diethorn, and T. Gänsler, “Room impulse response variation due to thermal fluctuation and its impact on acoustic echo cancellation,” in International Workshop on Acoustic Echo and Noise Control (IWAENC2003), 2003.

[23] A. Andreopoulou and A. Roginska, “Towards the creation of a standardized HRTF repository,” in 131th Convention of the Audio Engineering Society (AES), 2011, Convention Paper 8571.

[24] D. Schwarz and M. Wright, “Extensions and applications of the SDIF sound description interchange format,” in Proceedings of the International Computer Music Conference, 2000.

[25] J. Merimaa, T. Peltonen, and T. Lokki, “Concert hall impulse responses - Pori, Finland,” 2005. http://www.acoustics.hut.fi/projects/poririrs/.

[26] H. Ziegelwanger and P. Majdak, “Continuous-direction model of the time-of-arrival in the head-related transfer functions,” J Acoust Soc Am, submitted.

[27] M. Noisternig, F. Zotter, and B. F. Katz, “Reconstructing sound source directivity in virtual acoustic environments,” in Principles and Applications of Spatial Hearing, Y. Suzuki, D. S. Brungart, and H. Kato, Eds. Singapore: World Scientific Publishing, 2011, pp. 357–373.

SOFA (Spatially Oriented Format for Acoustics)

2013-05-21T12:13:13Z

Ente: Protected "SOFA (Spatially Oriented Format for Acoustics)" (‎[edit=sysop] (indefinite) ‎[move=sysop] (indefinite))

SOFA is a file format for storing [http://en.wikipedia.org/wiki/Spatial_sound spatially] oriented acoustic data like [http://en.wikipedia.org/wiki/Head-related_transfer_function head-related transfer functions (HRTFs]) and binaural or directional room impulse responses (BRIRs, DRIRs). This website aims at providing SOFA-relevant information.

* [[General information on SOFA]]
* [[SOFA specifications]]

SOFA conventions are designed for a consistent description of data stored in SOFA. The aim is the exchange of the data between researches and users. For each conventions, data exist from corresponding measurement setups and its description has been accepted by the peer group. Suggestions for new SOFA conventions and additions to existing ones are highly welcome.

* [[SOFA conventions]]

List of repositories with SOFA files containing [http://en.wikipedia.org/wiki/Head-related_transfer_function HRTFs], BRIRs, and DRIRs measured by different researchers.
* [[Files|Files (HRTFs, BRIRs, DRIRs)]]

SOFA files can be read and modified by a variety of software and application-programming interfaces (APIs).

* [[Software]]
* [[APIs]]

SOFA is result of the work of many people from various institutions.
* [[People behind SOFA]]

Talk:SOFA conventions

2013-05-21T11:41:49Z

Ente: Reverted edits by 193.171.195.36 (talk) to last revision by Petibub

== Headphone transfer functions (HpTFs) ==

Measured data exist as IRs. More information on metadata and measurement setups required. Corresponding researchers contacted. Waiting for response...

== Include anthropometric data (AD) ==

Several request received on "include AD in SOFA". But none of them could specify what actually to store. What is clear that AD stored with CIPIC are not sufficient. In ARI more AD are store than in CIPIC, but there is no proof that these AD are of any use. So?

== Crosstalk cancellation filters (CTCFs) ==

When saving HRTFs, why not save CTCFs? Check and discuss how the representation of CTCFs differs from the representation of HRTFs. It might be that SimpleFreeFieldHRIR is sufficient and the difference between HRTFs and CTCFs is simple the interpretation. Then, a note in GLOBAL_Comment might be sufficient.

At the same time, the calculation and use of CrossTalk cancellation filters goes beyond a general SOFA dataset. One can of course calculate the CTCFs filter if one wants, using various methods, but it is by no means an inherent part of the measured data, and more an application specific post-processing tool for a specific installation. It is, of course, also dependent on the speaker positions of the playback system chosen, and therefore this information should be stored within SOFA if required.

It seems like more information from researchers about their requirements is required.

== Include calibration data ==

* Are data available?
* Is a description of the measurement setup available?
* What metadata should be stored?
* How to standardize the description of the calibration?

Corresponding researchers contacted, waiting for response...

Calibration data can hav several forms, depending on the measurement in question. If the measurement is a transfer function, and that it it's intention, then one could provide the measured transfer function of the measurement chain without the measurement object present. In the case of the HRTF, this is the measured transfer function without the head present. As there are various means of removing the effects of the measurement chain (deconvolution, spectral equalizing) the "calibrated" final data may vary between methods. If the object if to provide the data in its most raw form, for other researchers to use, the uncalibrated data, along with necessary calibration files, is of interest. In this way, the frequency response of the key elements, notably the microphone and speakers, can be both examined and taken into account. In the context of HRTF measurements which use multiple speakers, the calibration of each speaker is crucial in order to avoid spectral coloration which is independent of the head response and therefor an artifact of the measurement system. In such a case, impulse responses should be provided for each speaker, with the microphone oriented on-axis to the speaker. This can be performed with the measurement microphones used for the data acquisition, or a calibrated measurement microphone, whose model should be clearly stated. If the second is employed, a microphone measurement file is also necessary, consisting of a calibration measurement for a single speaker and the accompanying impulse response of all 3 microphones (again, in the case of and HRTF measurement). For a truly robust analysis of the data, this calibration measurement is made before and after the measurement session, to ensure no time independence of the measurement system, which is not always the case. In such a case that the before/after data do not correspond, the data should not be utilized. The actual data to be included is therefore a simple impulse response clearly annotated to indicate the microphone/speaker in question. This therefore requires in a multi-speaker measurement condition that each entry in the HRTF set includes a speaker ID. In the event that "un-calibrated", or already calibrated processed data, is provided, then there should be a clear text description indicating the calibration method used, and any addition post-treatment, such as low-frequency interpolated data (how, frequency range), equalization (diffuse field or otherwise), etc. As these different elements are clearly of more interest to researchers, rather than industrial uses, they cannot be "required elements". A simple required tag should be available indicating if the data is "raw" with accompanying calibration data, or is "processed".
* Seems like we need a good definition of "raw", "processed", and "un-calibrated". Then we could provide an attribute, e.g., ProcessingState. Otherwise, we could use "ProcessingState" in the same way we use "Comments", namely, include a narrative description of the processing steps. Then we could write GLOBAL_ProcessingState = "Deconvolution with exp. sweep, windowing at ..., filtering at..." and so on. Applications which do not care, could ignore it; researchers who care could interpret it.

In the case of measurements where the absolute level is of importance, the calibration data is more typically that of a piston/speaker phone which provides a known SPL level. This is of specific interest when distributed microphones are employed to measure the spatial distribution of a sound field. In this instance, the calibration data can either be the noted RMS level of the calibrated source for each microphone (noting of course the model and settings of the calibrated source, and if possible, meterological conditions). To be consistent with the above mentioned HRTF case, the recorded calibration audio file could be provided, again noting the model and settings used.
* It seems like we would need to save the IRs from speaker(s) and microphone(s) together with other metadata like levels. Would it be sufficient to store that information in a separate SOFA file? Applications which do not care, would not have this ballast. Researchers who care, could use it to reproduce all post-processing steps. A new SOFA conventions for calibration would do - Does it make sense?

== Include room pictures ==

* Are data available?
* Is a description of the measurement setup available?
* What metadata should be stored?
* How to standardize the description of the pictures (camera position, room description)? There is [http://en.wikipedia.org/wiki/FITS FITS] for astronomy maybe we can learn from this format?

Corresponding researchers contacted, waiting for response...