Research on Quality Control Method of Hearing Aids Based on ISTS Speech Signals
HAO Ye1，WANG Li2，LI Shu1，LI Jiage1
1. Institute for Medical Device Control, National Institutes for Food and Drug Control, Beijing 100050, China丨
2. Hottinger Baldwin Measuremen (Suzhou) Co., Ltd., Beijing 100040, China
Abstract：Objective To realize the construction of hearing aid test platform and quality control methods under the stimulation of
speech like signals by analyzing the current quality control status of hearing aids in the field of speech signals and studying the
corresponding quality evaluation methods. Methods In this study, the speech-ISTS signal was used as the sound source, the source
was outputted by artificial mouth after frequency response equalization. The substitution method was used to measure the input and
output sound pressure levels of hearing aids in the frequency range of 200 Hz -8000 Hz, calculate the gain in the full frequency range
and draw the spectrum, and then complete the speech recognition performance evaluation of hearing aids. Results By adjusting
the intensity of speech stimulation signal, the LTASS Gain of the hearing aid at 55 dB, 65 dB and 80 dB sound pressure levels and
the Percentile Gain were analyzed. By comparison, the maximum gain test results of the product were consistent with the nominal
parameter of the product. Conclusion The objective evaluation of speech recognition performance of hearing aids is closer to the real
use environment than the acoustic evaluation under pure tone stimulation. Compared with subjective audiometry, it can quantitatively
evaluate the performance of products and has stronger operability. It is an important method for quality control of hearing aids.
郝烨1，王利2，李澍1，李佳戈1. 基于ISTS言语信号的助听器质控方法研究[J]. 中国医疗设备, 2021, 36(8): 19-21.
HAO Ye1，WANG Li2，LI Shu1，LI Jiage1. Research on Quality Control Method of Hearing Aids Based on ISTS Speech Signals. China Medical Devices, 2021, 36(8): 19-21.
