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Identification of the lateral position of a virtual object based on echoes by humans

Identification of the lateral position of a virtual object based on echoes by humans
Identification of the lateral position of a virtual object based on echoes by humans
is known about the factors influencing object localisation using a ‘searching’ strategy. In this paper, we describe a series of experiments using sighted and blind human listeners and a ‘virtual auditory space’ technique to investigate the effects of the distance and orientation of a reflective object and the effect of stimulus bandwidth on ability to identify the right-versus-left position of the object, with bands of noise and durations from 10–400 ms. We found that performance reduced with increasing object distance. This was more rapid for object orientations where mirror-like reflection paths do not exist to both ears (i.e. most possible orientations); performance with these orientations was indistinguishable from chance at 1.8 m for even the best performing listeners in other conditions. Above-chance performance extended to larger distances when the echo was artificially presented in isolation, as might be achieved in practice by an assistive device. We also found that performance was primarily based on information above 2 kHz. Further research should extend these investigations to include other factors that are relevant to real-life echolocation.

0378-5955
56-65
Rowan, Daniel
5a86eebe-53da-4cd2-953e-e3ca1ae61578
Papadopoulos, Timos
d1af8c5a-f58c-44c8-a4bb-6d2ad9695f95
Edwards, David
8f7765fb-b466-4f28-8bcc-6d1a041aa33d
Holmes, Hannah
c7782dea-eb24-489c-b4fc-06ac2af002d6
Hollingdale, Anna
4f13fcdd-fecf-42a1-9f4b-a754b966e14d
Evans, Leah
5b7a74f0-e806-478e-8538-690623f2d474
Allen, Robert
956a918f-278c-48ef-8e19-65aa463f199a
Rowan, Daniel
5a86eebe-53da-4cd2-953e-e3ca1ae61578
Papadopoulos, Timos
d1af8c5a-f58c-44c8-a4bb-6d2ad9695f95
Edwards, David
8f7765fb-b466-4f28-8bcc-6d1a041aa33d
Holmes, Hannah
c7782dea-eb24-489c-b4fc-06ac2af002d6
Hollingdale, Anna
4f13fcdd-fecf-42a1-9f4b-a754b966e14d
Evans, Leah
5b7a74f0-e806-478e-8538-690623f2d474
Allen, Robert
956a918f-278c-48ef-8e19-65aa463f199a

Rowan, Daniel, Papadopoulos, Timos, Edwards, David, Holmes, Hannah, Hollingdale, Anna, Evans, Leah and Allen, Robert (2013) Identification of the lateral position of a virtual object based on echoes by humans. Hearing Research, 300, 56-65. (doi:10.1016/j.heares.2013.03.005).

Record type: Article

Abstract

is known about the factors influencing object localisation using a ‘searching’ strategy. In this paper, we describe a series of experiments using sighted and blind human listeners and a ‘virtual auditory space’ technique to investigate the effects of the distance and orientation of a reflective object and the effect of stimulus bandwidth on ability to identify the right-versus-left position of the object, with bands of noise and durations from 10–400 ms. We found that performance reduced with increasing object distance. This was more rapid for object orientations where mirror-like reflection paths do not exist to both ears (i.e. most possible orientations); performance with these orientations was indistinguishable from chance at 1.8 m for even the best performing listeners in other conditions. Above-chance performance extended to larger distances when the echo was artificially presented in isolation, as might be achieved in practice by an assistive device. We also found that performance was primarily based on information above 2 kHz. Further research should extend these investigations to include other factors that are relevant to real-life echolocation.

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More information

e-pub ahead of print date: 26 March 2013
Published date: May 2013
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 351884
URI: http://eprints.soton.ac.uk/id/eprint/351884
ISSN: 0378-5955
PURE UUID: d1fb7e5f-c5c3-4e17-922a-2f5f0fbb50c8
ORCID for Daniel Rowan: ORCID iD orcid.org/0000-0002-7190-9997

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Date deposited: 25 Apr 2013 14:43
Last modified: 08 Jan 2022 02:57

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Contributors

Author: Daniel Rowan ORCID iD
Author: Timos Papadopoulos
Author: David Edwards
Author: Hannah Holmes
Author: Anna Hollingdale
Author: Leah Evans
Author: Robert Allen

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