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Investigation of the effect of impedance on azimuth cues derived from spherical head models

Treeby, BE; Paurobally, RM; Pan, J; (2006) Investigation of the effect of impedance on azimuth cues derived from spherical head models. In: Proceedings of the 12th International Conference on Auditory Display. (pp. pp. 223-226). ICAD: London, UK. Green open access

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Abstract

Recent implementations of virtual sound using head related transfer functions often include an analytical low frequency diffraction model to reproduce stable azimuth cues which are independent of the quality and accuracy of high frequency pinnae data. This paper investigates the previously neglected effects of surface acoustic impedance on the salient azimuth cues produced by a single sphere diffraction model. Results indicate an increase in interaural level difference with both a decreasing impedance magnitude and an increasingly negative impedance phase component. The interaural time difference appears to be less sensitive to impedance changes although an increase is evident with a decreasing impedance magnitude, particularly for sources near the interaural axis. These changes produce offset interaural cues which correspond to a shift in source location in the virtual environment. The effect of incorporating a frequency dependent impedance based on the approximate acoustic properties of hair is also discussed.

Type: Proceedings paper
Title: Investigation of the effect of impedance on azimuth cues derived from spherical head models
Event: 12th International Conference on Auditory Display
Location: London, UK
Dates: June 20-23, 2006
Open access status: An open access version is available from UCL Discovery
Publisher version: http://hdl.handle.net/1853/50595
Language: English
Additional information: This paper is licensed under the Creative Commons Attribution - Non Commercial International License (currently, creativecommons.org/licenses/by-nc/4.0).
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10061774
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