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The effect of stimulus bandwidth and subject position on horizontal-plane localization with virtual source images

The effect of stimulus bandwidth and subject position on horizontal-plane localization with virtual source images
The effect of stimulus bandwidth and subject position on horizontal-plane localization with virtual source images
In an anechoic chamber normal-hearing subjects performed a localization task in the frontal horizontal plane. The stimulus was a 200-ms burst of filtered noise. Within a block of trials, half of the presentations (randomly determined) were ``real''—presented from single loudspeakers—and the other half were ``phantoms''—produced by the simultaneous activation of two loudspeakers at ±30° using a virtual source imaging technique [Takeuchi et al., J. Acoust. Soc. Am. 109, 958–971 (2001)]. Both phantom and real sources spanned the azimuthal range ±80°. When the stimulus was a 4 kHz low-pass filtered noise, rms error was only slighly higher for phantom (D=7.1°) than for real (D=5.5°) sources. For 8 kHz low-pass filtered noise, performance remained about the same for real sources, but increased for phantom sources (D=11.5°). Data will also be reported for conditions in which the subject's position is systematically varied outside the ``sweet spot.'' Results will be discussed in terms of robustness of the virtual imaging technique to stimulus and position factors and its potential usefulness as a tool for the investigation of human auditory spatial perception in static and dynamic environments. [Work supported by NIDCD.]
2270
Grantham, D. Wesley
a2dc4972-9b6d-4a71-80d6-ceb24b78478b
Ashmead, Daniel H.
b9073a6d-9399-4d9a-99ce-75985175791c
Wall, Robert S.
29c17366-20e3-4a73-880a-c74aed4db3a7
Frampton, Kenneth D.
94506b25-ed47-4216-8795-9f33a3761cfc
Willhite, J. Andrew
5e6377bd-20c5-4cd6-bb54-6ca7b1569a60
Grantham, D. Wesley
a2dc4972-9b6d-4a71-80d6-ceb24b78478b
Ashmead, Daniel H.
b9073a6d-9399-4d9a-99ce-75985175791c
Wall, Robert S.
29c17366-20e3-4a73-880a-c74aed4db3a7
Frampton, Kenneth D.
94506b25-ed47-4216-8795-9f33a3761cfc
Willhite, J. Andrew
5e6377bd-20c5-4cd6-bb54-6ca7b1569a60

Grantham, D. Wesley, Ashmead, Daniel H., Wall, Robert S., Frampton, Kenneth D. and Willhite, J. Andrew (2003) The effect of stimulus bandwidth and subject position on horizontal-plane localization with virtual source images. 145th Meeting of the Acoustical Society of America. 28 Apr - 02 May 2003. p. 2270 .

Record type: Conference or Workshop Item (Paper)

Abstract

In an anechoic chamber normal-hearing subjects performed a localization task in the frontal horizontal plane. The stimulus was a 200-ms burst of filtered noise. Within a block of trials, half of the presentations (randomly determined) were ``real''—presented from single loudspeakers—and the other half were ``phantoms''—produced by the simultaneous activation of two loudspeakers at ±30° using a virtual source imaging technique [Takeuchi et al., J. Acoust. Soc. Am. 109, 958–971 (2001)]. Both phantom and real sources spanned the azimuthal range ±80°. When the stimulus was a 4 kHz low-pass filtered noise, rms error was only slighly higher for phantom (D=7.1°) than for real (D=5.5°) sources. For 8 kHz low-pass filtered noise, performance remained about the same for real sources, but increased for phantom sources (D=11.5°). Data will also be reported for conditions in which the subject's position is systematically varied outside the ``sweet spot.'' Results will be discussed in terms of robustness of the virtual imaging technique to stimulus and position factors and its potential usefulness as a tool for the investigation of human auditory spatial perception in static and dynamic environments. [Work supported by NIDCD.]

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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: 42264
URI: https://eprints.soton.ac.uk/id/eprint/42264
PURE UUID: 35f3acfd-d24e-4c8d-982d-a0a86572b8bf

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

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