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The binaural performance of a cross-talk cancellation system with matched or mismatched set up and playback acoustics

The binaural performance of a cross-talk cancellation system with matched or mismatched set up and playback acoustics
The binaural performance of a cross-talk cancellation system with matched or mismatched set up and playback acoustics
Cross-talk cancellation is a method for synthesizing virtual auditory space using loudspeakers. One implementation is the “Optimal Source Distribution” technique [T. Takeuchi and P. Nelson, J. Acoust. Soc. Am. 112, 2786–2797 (2002)], in which the audio bandwidth is split across three pairs of loudspeakers, placed at azimuths of ±90°, ±15°, and ±3°, conveying low, mid, and high frequencies, respectively. A computational simulation of this system was developed and verified against measurements made on an acoustic system using a manikin. Both the acoustic system and the simulation gave a wideband average cancellation of almost 25 dB. The simulation showed that when there was a mismatch between the head-related transfer functions used to set up the system and those of the final listener, the cancellation was reduced to an average of 13 dB. Moreover, in this case the binaural interaural time differences and interaural level differences delivered by the simulation of the optimal source distribution (OSD) system often differed from the target values. It is concluded that only when the OSD system is set up with “matched” head-related transfer functions can it deliver accurate binaural cues.
0001-4966
1056-1069
Akeroyd, Michael A.
fda38133-e372-410b-b450-6306e68d3442
Chambers, John
b1d5e666-1509-47a1-95eb-f6def4883135
Bullock, David
6057bfa2-1751-4e03-9772-043aa7a22b47
Palmer, Alan R.
1b7c60fe-ba06-47fa-8a91-b46280b846ab
Summerfield, A. Quentin
e4ee1cda-68c2-4920-b4cc-2924c20b805a
Nelson, Philip A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Gatehouse, Stuart
f301bf27-10aa-4c18-8e90-31e0a5c57492
Akeroyd, Michael A.
fda38133-e372-410b-b450-6306e68d3442
Chambers, John
b1d5e666-1509-47a1-95eb-f6def4883135
Bullock, David
6057bfa2-1751-4e03-9772-043aa7a22b47
Palmer, Alan R.
1b7c60fe-ba06-47fa-8a91-b46280b846ab
Summerfield, A. Quentin
e4ee1cda-68c2-4920-b4cc-2924c20b805a
Nelson, Philip A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Gatehouse, Stuart
f301bf27-10aa-4c18-8e90-31e0a5c57492

Akeroyd, Michael A., Chambers, John, Bullock, David, Palmer, Alan R., Summerfield, A. Quentin, Nelson, Philip A. and Gatehouse, Stuart (2007) The binaural performance of a cross-talk cancellation system with matched or mismatched set up and playback acoustics. Journal of the Acoustical Society of America, 121 (2), 1056-1069. (doi:10.1121/1.2404625).

Record type: Article

Abstract

Cross-talk cancellation is a method for synthesizing virtual auditory space using loudspeakers. One implementation is the “Optimal Source Distribution” technique [T. Takeuchi and P. Nelson, J. Acoust. Soc. Am. 112, 2786–2797 (2002)], in which the audio bandwidth is split across three pairs of loudspeakers, placed at azimuths of ±90°, ±15°, and ±3°, conveying low, mid, and high frequencies, respectively. A computational simulation of this system was developed and verified against measurements made on an acoustic system using a manikin. Both the acoustic system and the simulation gave a wideband average cancellation of almost 25 dB. The simulation showed that when there was a mismatch between the head-related transfer functions used to set up the system and those of the final listener, the cancellation was reduced to an average of 13 dB. Moreover, in this case the binaural interaural time differences and interaural level differences delivered by the simulation of the optimal source distribution (OSD) system often differed from the target values. It is concluded that only when the OSD system is set up with “matched” head-related transfer functions can it deliver accurate binaural cues.

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Published date: February 2007

Identifiers

Local EPrints ID: 50428
URI: https://eprints.soton.ac.uk/id/eprint/50428
ISSN: 0001-4966
PURE UUID: 874db5f0-3e13-4df2-8d16-6774183565ec

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Date deposited: 25 Feb 2008
Last modified: 13 Mar 2019 20:51

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