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A study on the development of a high-performance digital hearing aid and the method of its fitting

高性能数字助听器的研制及其验配方法研究

基本信息

批准号：
06557089
负责人：
SONE Toshio
金额：
$ 7.1万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06557089/
关键词：
digital hearing aids recruitment loudness loudness compensation categorical scaling method digital signal processing fitting hearing aids fitting 補聴器騒音抑圧衝撃音抑圧ハウリング抑圧 2段階評定尺度法

项目摘要

The algorithm compensating for loudness recruitment was installed in portable digital hearing aids that were custom-made for this study, and its performance was evaluated in daily lives. The loudness compensation function was set to be linear for lower input levels, so that spectral subtraction was achieved to suppress environmental or background noise. Though digital hearing aids have the merit of flexibility in their characteristics, it often takes relatively long time for fitting. Thus, methods for estimating accurate loudness-compensation function efficiently were also studied. As the result of the study, it has been shown that the subdivided one-step categorical scaling method is the best method for the present purpose.On the basis of these results, loudness compensation functions were measured for more than one hundred impaired-listeners, and the fitting procedure was carried out with those functions to the impaired. Long-time field tests with the fitted digital hearing aids were conducted by the impaired in their daily lives. The listeners evaluated performance of the hearing aids in a scale of seven categories for some situations such like listening to radio/television in quiet, conversation among a few persons in quiet and in noisy environment, conversation among great numbers of people, listening to speech on the street, appraisal of the quality of self-uttered voice, and so on. The results show that the performance of the new hearing aids are significantly better than those achieved by conventional hearing aids in all the situations.

将补偿响度恢复的算法安装在为本研究定制的便携式数字助听器中，并在日常生活中评估其性能。对于较低的输入电平，响度补偿函数被设置为线性的，从而实现谱减法以抑制环境或背景噪声。虽然数字助听器在其特性上具有灵活性的优点，但它通常需要相对较长的时间来适应。因此，本文还研究了如何有效地估计精确的线性补偿函数。在此基础上，对100多名听力障碍者的响度补偿函数进行了测量，并对这些函数进行了拟合。在日常生活中，由受损者使用安装的数字助听器进行长时间的现场测试。听众在七个类别的范围内评估助听器在某些情况下的性能，例如在安静的情况下收听广播/电视，在安静和嘈杂的环境中少数人之间的谈话，大量人群之间的谈话，在街上听演讲，自我发声的质量评估，结果表明，新型助听器在所有情况下的性能都明显优于传统助听器。