Tuning in the spatial dimension: Evidence from a masked speech identification task

Nicole L Marrone, Christine R. Mason, Gerald Kidd

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Spatial release from masking was studied in a three-talker soundfield listening experiment. The target talker was presented at 0° azimuth and the maskers were either colocated or symmetrically positioned around the target, with a different masker talker on each side. The symmetric placement greatly reduced any "better ear" listening advantage. When the maskers were separated from the target by ±15°, the average spatial release from masking was 8 dB. Wider separations increased the release to more than 12 dB. This large effect was eliminated when binaural cues and perceived spatial separation were degraded by covering one ear with an earplug and earmuff. Increasing reverberation in the room increased the target-to-masker ratio (TM) for the separated, but not colocated, conditions reducing the release from masking, although a significant advantage of spatial separation remained. Time reversing the masker speech improved performance in both the colocated and spatially separated cases but lowered TM the most for the colocated condition, also resulting in a reduction in the spatial release from masking. Overall, the spatial tuning observed appears to depend on the presence of interaural differences that improve the perceptual segregation of sources and facilitate the focus of attention at a point in space.

Original languageEnglish (US)
Pages (from-to)1146-1158
Number of pages13
JournalJournal of the Acoustical Society of America
Volume124
Issue number2
DOIs
StatePublished - 2008
Externally publishedYes

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masking
tuning
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reversing
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reverberation
azimuth
rooms
coverings
Tuning
Masking
Talkers

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Tuning in the spatial dimension : Evidence from a masked speech identification task. / Marrone, Nicole L; Mason, Christine R.; Kidd, Gerald.

In: Journal of the Acoustical Society of America, Vol. 124, No. 2, 2008, p. 1146-1158.

Research output: Contribution to journalArticle

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