Sound localization of frequency-modulated sinusoids by Old World monkeys

Bradford Jay May, David B. Moody, William C. Stebbins, Mary A. Norat

Research output: Contribution to journalArticle

Abstract

Directional hearing acuity, as measured by the minimum audible angle (MAA), was determined in four Old World monkeys, Macaca radiata. The acoustic stimuli were linear changes in frequency (sweeps) for different frequency ranges and sweep rates. The sweeps ranged between 0.5 and 1.3 kHz, at two durations, 100 and 200 ms. in upsweeps which began at 0.5 kHz and were 200 ms in duration, MAA decreased as sweep rate and frequency range increased. These thresholds were compared to MAAs of sweeps which traversed the same range of frequencies but at a different rate, to MAAs of sweeps with identical rates but over different frequency ranges, and to the MAAs of downsweeps. These comparisons indicated that range, and not sweep rate, exerts the greatest effect on the MAA. Interaural phase differences derived from the upper limits of the frequency range are discussed as potential FM localization cues.

Original languageEnglish (US)
Pages (from-to)776-782
Number of pages7
JournalJournal of the Acoustical Society of America
Volume80
Issue number3
DOIs
StatePublished - 1986
Externally publishedYes

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sound localization
monkeys
sine waves
frequency ranges
acuity
sweep frequency
cues
hearing
stimuli
frequency modulation
Monkey
Sound Localization
thresholds
acoustics

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Arts and Humanities (miscellaneous)

Cite this

Sound localization of frequency-modulated sinusoids by Old World monkeys. / May, Bradford Jay; Moody, David B.; Stebbins, William C.; Norat, Mary A.

In: Journal of the Acoustical Society of America, Vol. 80, No. 3, 1986, p. 776-782.

Research output: Contribution to journalArticle

May, Bradford Jay ; Moody, David B. ; Stebbins, William C. ; Norat, Mary A. / Sound localization of frequency-modulated sinusoids by Old World monkeys. In: Journal of the Acoustical Society of America. 1986 ; Vol. 80, No. 3. pp. 776-782.
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