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 (Δφ) 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 Δφ 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