Study on Hearing Threshold of Short Tones

Abstract

Using psycho-acoustic methods, hearing threshold of short tones were determind for normal and impaired ear at various duration of test tones. There were significant difference between the normal ear and perceptive types of deafness with regard to their threshold acuities as a function of stimulus duration. In order to describe precisely psycho-acoustic phenomena of hearing, the time factors of test tones should be considered to be important as well as intensity factor of test tones. The psycho-acoustic measurements of hearing threshold of short tones is so simple and conventional that the two factors, time factor and intensity factor of test tones, are obtained simultaneously. The deviations of jugments of threshold responses to short tones was excellently smaller than continuous tones which was now used routinely. The data calculated in this investigations did not completly fit the Gerner-Miller's model (I-I0)T=K. Several different energy level where the temporal summations was performed, were considered on “σ scale” (a scale of psychology).The peripheral acoustic-neural mechanism in man was discussed on the results of this psycho-acoustic investigations.