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Reduced order modeling of head related transfer functions for virtual acoustic displays

Reduced order modeling of head related transfer functions for virtual acoustic displays
Reduced order modeling of head related transfer functions for virtual acoustic displays
The purpose of this work is to improve the computational efficiency in acoustic virtual applications by creating and testing reduced order models of the head related transfer functions used in localizing sound sources. State space models of varying order were generated from zero-elevation Head Related Impulse Responses (HRIRs) using Kungs Single Value Decomposition (SVD) technique. The inputs to the models are the desired azimuths of the virtual sound sources (from minus 90 deg to plus 90 deg, in 10 deg increments) and the outputs are the left and right ear impulse responses. Trials were conducted in an anechoic chamber in which subjects were exposed to real sounds that were emitted by individual speakers across a numbered speaker array, phantom sources generated from the original HRIRs, and phantom sound sources generated with the different reduced order state space models. The error in the perceived direction of the phantom sources generated from the reduced order models was compared to errors in localization using the original HRIRs.
2270
Acoustical Society of America
Willhite, J.A.
eb766841-99c5-4391-9800-a39ba3157c5e
Frampton, K.D.
dac17a56-41de-4b0e-b55d-1c5828e780d1
Grantham, D. Wesley
a2dc4972-9b6d-4a71-80d6-ceb24b78478b
Willhite, J.A.
eb766841-99c5-4391-9800-a39ba3157c5e
Frampton, K.D.
dac17a56-41de-4b0e-b55d-1c5828e780d1
Grantham, D. Wesley
a2dc4972-9b6d-4a71-80d6-ceb24b78478b

Willhite, J.A., Frampton, K.D. and Grantham, D. Wesley (2003) Reduced order modeling of head related transfer functions for virtual acoustic displays. In Program of the 145th Meeting of the Acoustical Society of America. Acoustical Society of America. p. 2270 .

Record type: Conference or Workshop Item (Paper)

Abstract

The purpose of this work is to improve the computational efficiency in acoustic virtual applications by creating and testing reduced order models of the head related transfer functions used in localizing sound sources. State space models of varying order were generated from zero-elevation Head Related Impulse Responses (HRIRs) using Kungs Single Value Decomposition (SVD) technique. The inputs to the models are the desired azimuths of the virtual sound sources (from minus 90 deg to plus 90 deg, in 10 deg increments) and the outputs are the left and right ear impulse responses. Trials were conducted in an anechoic chamber in which subjects were exposed to real sounds that were emitted by individual speakers across a numbered speaker array, phantom sources generated from the original HRIRs, and phantom sound sources generated with the different reduced order state space models. The error in the perceived direction of the phantom sources generated from the reduced order models was compared to errors in localization using the original HRIRs.

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More information

Published date: 2003
Venue - Dates: 145th Meeting of the Acoustical Society of America, 2003-04-28 - 2003-05-02

Identifiers

Local EPrints ID: 42263
URI: https://eprints.soton.ac.uk/id/eprint/42263
PURE UUID: ef2e085a-dec1-4371-b8a5-85bba751fff2

Catalogue record

Date deposited: 29 Nov 2006
Last modified: 13 Mar 2019 21:12

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