Third International Conference on Spoken Language Processing (ICSLP 94)
A new hearing aid evaluation method using variable-speech-rate audioraetry (VSRA) was recently developed. VSRA was newly created based on the Japanese speech audiometry authorized by the Japan Audiological Society. The ordinary speech audiometry can not reveal a temporal factor in word discrimination ability of the hearing impaired. Since, with VSRA, we can compare several performance-intensity curves obtained from different speech-rate speech audiometries, the impact on the auditory system of each patient by the fast or slow speech rate could be easily determined. Taking the temporal factor of the auditory systems into consideration by using VSRA, hearing aid evaluation was performed for a master hearing aid with three types of signal processings and fittings for 36 hearing impaired subjects. VSRA was useful for hearing aid evaluation, in particular, for cases when ordinary normal speech rate audiometry does not provide a significant difference in word discrimination scores. In addition, using VSRA revealed that amplitude compression is more effective for improvement of word discrimination than linear amplification.
Bibliographic reference. Hosoi, Hiroshi / Tsuta, Yoshiaki / Nishida, Takashi / Murata, Kiyotaka / Ohta, Fumihiko / Mekata, Tsuyoshi / Kato, Yumiko (1994): "Hearing aid evaluation using variable - speech - rate audiometry", In ICSLP-1994, 1995-1998.