The role of spatial location in auditory search

Eramudugolla, Ranmalee, McAnally, Ken I., Martin, Russell L., Irvine, Dexter R. F. and Mattingley, Jason B. (2008) The role of spatial location in auditory search. Hearing Research, 238 1-2: 139-146. doi:10.1016/j.heares.2007.10.004

Author Eramudugolla, Ranmalee
McAnally, Ken I.
Martin, Russell L.
Irvine, Dexter R. F.
Mattingley, Jason B.
Title The role of spatial location in auditory search
Journal name Hearing Research   Check publisher's open access policy
ISSN 0378-5955
Publication date 2008-04-01
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.heares.2007.10.004
Open Access Status
Volume 238
Issue 1-2
Start page 139
End page 146
Total pages 7
Editor J. Eggermont
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
380101 Sensory Processes, Perception and Performance
780108 Behavioural and cognitive sciences
Abstract The majority of research findings to date indicate that spatial cues play a minor role in enhancing listeners' ability to parse and detect a sound of interest when it is presented in a complex auditory scene comprising multiple simultaneous sounds. Frequency and temporal differences between sound streams provide more reliable cues for scene analysis as well as for directing attention to relevant auditory 'objects' in complex displays. The present study used naturalistic sounds with varying spectro-temporal profiles to examine whether spatial separation of sound sources can enhance target detection in an auditory search paradigm. The arrays of sounds were presented in virtual auditory space over headphones. The results of Experiment 1 suggest that target detection is enhanced when sound sources are spatially separated relative to when they are presented at the same location. Experiment 2 demonstrated that this effect is most prominent within the first 250ms of exposure to the array of sounds. These findings suggest that spatial cues may be effective for enhancing early processes such as stream segregation, rather than simply directing attention to objects that have already been segmented.
Keyword Audiology & Speech-Language Pathology
Audiology & Speech-Language Pathology
Neurosciences & Neurology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Wed, 19 Mar 2008, 19:45:45 EST