Kimberley B P, Dymond R, Gamer A
University of Calgary, Alberta, Canada.
Ear Nose Throat J. 1994 Mar;73(3):176-9.
The rehabilitation of binaural hearing performance in hearing impaired listeners has received relatively little attention to date. Both localization ability and speech-understanding-in noise are affected in the impaired listener. When localization performance is tested in impaired ears with conventional hearing aid fittings it is found to be worse than the unaided condition. Advances in electronic design now permit speculation about the implementation of complex digital filters within the confines of an in-the-ear hearing aid. We have begun exploring strategies to enhance the localization performance of impaired listeners with bilateral digital signal processing. We are examining three strategies in bilateral hearing aid design to improve localization performance in hearing impaired listeners, namely 1) more accurate fitting of individual ear losses, 2) equalization of the effect of the hearing aid itself on the acoustics within the ear canal, and 3) binaural fitting strategies which in effect modify individual ear fittings to enhance localization performance. The results of early psychophysical testing suggests that localization performance can be improved with these strategies.
到目前为止，听力受损听众双耳听力性能的康复受到的关注相对较少。受损听众的定位能力和噪声环境下的言语理解能力都会受到影响。当使用传统助听器对受损耳朵进行定位性能测试时，发现其定位性能比不使用助听器时更差。电子设计的进步现在使得人们可以推测在耳内助听器的范围内实现复杂数字滤波器的可能性。我们已经开始探索通过双边数字信号处理来提高受损听众定位性能的策略。我们正在研究双边助听器设计中的三种策略，以改善听力受损听众的定位性能，即1）更精确地匹配个体听力损失，2）均衡助听器本身对耳道内声学的影响，3）双耳匹配策略，实际上是通过修改个体耳朵的助听器设置来提高定位性能。早期心理物理学测试的结果表明，通过这些策略可以提高定位性能。
