AUDIOLOGY JAPAN
Online ISSN : 1883-7301
Print ISSN : 0303-8106
ISSN-L : 0303-8106
Measurement of Critical Bandwidth in Acoustic Reflex (AR)
Relation between Magnitude of AR and Bandwidth of the Reflex Activating Sound
Takashi Miyakita
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1983 Volume 26 Issue 1 Pages 34-40

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Abstract

The reflex activating sounds consisted of a 1000Hz pure tone, and thirteen kinds of noise centered 1000Hz with bandwidth of 100, 250 and 1/3-octave frequencies in 500-5000Hz. The hockey stick regression method which is one of the two-phase regression analyses was used to estimate a critical bandwidth.
The existance of the critical bandwidth was confirmed in 81 subjects out of 89 with normal hearing acuity. The mean value and SD were 30.6±2.2dB (1148Hz).
The present method developed by the authors is one of the useful tools to estimate the critical bandwidth for AR, and the relation between the critical bandwidth for AR and that observed in psychophysical studies such as loudness summation or masking was discussed.

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© Japan Audiological Society
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