Sound localization: effects of reverberation time, speaker array, stimulus frequency, and stimulus rise/decay.
J Acoust Soc Am
; 94(2 Pt 1): 769-76, 1993 Aug.
Article
in En
| MEDLINE
| ID: mdl-8370883
ABSTRACT
This research assessed the ability of human listeners to localize one-third octave noise bands in the horizontal plane. The effects of reverberation time (absorbent versus reverberant room), stimulus center frequency (500, 1000, 2000, and 4000 Hz), stimulus rise/decay time (5 vs 200 ms) and speaker array (frontal versus lateral) were investigated for four subjects using a forced-choice speaker-identification paradigm. Sound localization scores were consistently lower in the reverberant room than in the absorbent room. They also revealed strong frequency and azimuthal effects. The benefit of a shorter rise/decay time was small and limited to low frequencies. The identification of a speaker position depended strongly upon the array in which it was embedded, primarily because localization in the lateral array led to frequency-dependent front/back confusions and response bias. The results also illustrated the importance of choosing a coordinate system based on the auditory cone-of-confusion to analyze localization data for speaker arrays spanning the aural axis.
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Database:
MEDLINE
Main subject:
Sound Localization
Type of study:
Prognostic_studies
Limits:
Female
/
Humans
/
Male
Language:
En
Year:
1993
Type:
Article