PMID: 3760331Sep 1, 1986Paper

Sound localization of frequency-modulated sinusoids by Old World monkeys

The Journal of the Acoustical Society of America
Bradford J MayM A Norat

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.

Citations

Apr 30, 2009·Annual Review of Neuroscience·Lizabeth M Romanski, Bruno B Averbeck
Jan 1, 1987·Journal of Sports Sciences·J R May
Jan 9, 1997·Nature·W Messier, C B Stewart
Dec 5, 2019·The Journal of the Acoustical Society of America·Jane A BurtonRamnarayan Ramachandran

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