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Study in the Selection of Optimum Hearing Aids with the Computer and the Practical Application of the Method in the Educational Field

计算机优选助听器的研究及其在教育领域的实际应用

基本信息

批准号：
60450103
负责人：
IMAI Hideo
金额：
$ 2.37万
依托单位：
The National Institute of Special Education
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

A data-base for hearing aids frequently used today was constructed. The items for retrieval are: the coded type of frequency response, maximum power output and maximum gain.Several criterion for selecting the optimum hearing aid, based on the data of hearing threshold level of the patient, were tested and finally the "speech level method" was adopted. The speech level method is to select the frequency response and gain that bring the mean speech spectrum level to the most comfortable level of the patient. However, in our program, several new modification were introduced.(1) The speech level as the target of amplification is gradually raised according to the severeness of the hearing level of the patient.(2) The weight of the frequency when a hearing aid is selected is adjusted to the severeness of the impairment of the patient. This is done by the low frequency region being more heavily weighted for the severely-impiared person.Our method for checking the suitability of the hearing aid fitted was also derived from this study. Several sound sources for checking were examined and band-noise was adopted as a result. Also the speech spectrum of Japanese was measured as the target of the amplification for fitting hearing aids.The program was actually applied to pupils enrolled in the schools for the deaf and the classes for the hard of hearing. The result was fairly good so that most of the pupils expressed more satisfication than with their previous hearing aid. There was almost no modification of the frequency response after fitting of the hearing aids, though several modifications were needed when the other selection criteria were applied.Now we can meet the demands of fitting the hearing aid in the actual educational field.

建立了当今常用助听器的数据库。检索项目为：本文对助听器的频率响应、最大功率输出和最大增益的编码方式进行了研究，并根据患者的听阈水平数据，对选择最佳助听器的几个标准进行了试验，最后采用了“言语水平法”。语音电平法是选择使平均语音频谱电平达到患者最舒适水平的频率响应和增益。然而，在我们的计划中，引入了一些新的修改。(1)作为放大目标的语音电平根据患者听力水平的高低而逐渐升高。(2)选择助听器时，频率的权重根据患者的损伤程度进行调整。这是通过对听力损失者的低频区域进行更重的加权来实现的。我们检查助听器适合性的方法也来自于这项研究。检查了几个声源，并采用了带噪声作为结果。此外，还测量了日语的语音频谱，作为安装助听器的放大目标。该方案实际上适用于聋哑学校和听力障碍班的学生。结果是相当好的，使大多数学生表示更满意，比他们以前的助听器。验配助听器后，频率响应几乎没有变化，但在应用其他选择标准时需要进行一些修改，现在我们可以满足实际教育领域验配助听器的要求。