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Measurement of auditory discriminating thresholds

LIANG Zhian SHAO Dianhua LUO Weizhi (Shanghai Institute of Physiology, Chinese Academy of Sciences, Shanghai.200031)  
With a newly designed FM/AM/φM sound stimulator, accurate measurements of auditory discriminating thresholds of frequency (Δf), intensity (ΔI) and phase (Δφ) were performed psychophysically in humans and electrophysiologically in guinea pigs. For normal hearing human subjects, the measured thresholds amount to 1.3±0 6 pps for Δf,0 4±0 2dB for ΔI,and 0.9±0 3° for Δφ For normal hearing guinea pigs, they are 2.5±1 1pps, 0 5±0 2 dB and 1.2±0 5°, correspondingly. The designed stimulator is simple in construction and easy to manipulate and the operating principles are described in details.
【CateGory Index】: TB52
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