PMID: 3745668Jul 1, 1986Paper

Loudness reduction and adaptation induced by a contralateral tone

The Journal of the Acoustical Society of America
M C BotteB Scharf

Abstract

An intermittent tone in one ear may induce a large decline in the loudness of a continuous tone in the contralateral ear [Botte et al., J. Acoust. Soc. Am. 72, 727-739 (1982)]. To uncover the basis for this induced loudness adaptation, the method of successive magnitude estimations was used to measure the loudness of a test tone in one ear during and after a single presentation of a brief inducer tone in the contralateral ear. Duration and frequency of the inducer were varied. The frequency of the test tone was set at 500, 1000, or 3000 Hz. Both inducer and test tones were at 60 dB SPL. When the inducer lasted 5 s or more and was at the same frequency as the test tone, the loudness of the test tone was reduced by 80% to 100% while the inducer was on. As the inducer frequency moved away from the test tone, the loudness reduction declined gradually except for a more marked drop at the point where the frequency separation exceeded the critical bandwidth. Loudness remained depressed after the inducer went off. Additional measurements showed that the amount of loudness reduction corresponded closely to the measured movement of the inducer's sound image away from the center of the listener's head (decentralization).

Citations

Oct 12, 2007·The Journal of the Acoustical Society of America·Junji YoshidaMasao Kasuga
Mar 9, 2006·The Journal of the Acoustical Society of America·Eva Wagner, Bertram Scharf
Jan 1, 1993·Audiology : Official Organ of the International Society of Audiology·C BaruchB Scharf

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