Sung G S, Sung R J, Hodgson W R, Angelelli R M
Audiology. 1976 May-Jun;15(3):257-62. doi: 10.3109/00206097609071784.
This study was designed to investigate the intelligibility of speech transduced through a classroom-installed FM system and a conventional induction loop amplification (ILA) system and to examine the applicability of an FM adapter when used with commercially available hearing aids. Findings indicate that speech reproduced via the FM system is significantly better than that of the conventional audio induction loop used in this study. It seems likely that the irregular high-frequency response of the ILA system was responsible for this difference. When an FM adapter was used in conjunction with body-type hearing aids, the frequency response of the telecoil along with the positioning of the adapter determine the total performance of the aid.
本研究旨在调查通过安装在教室的调频（FM）系统和传统感应线圈放大（ILA）系统传输的语音清晰度，并检验调频适配器与市售助听器配合使用时的适用性。研究结果表明，通过调频系统再现的语音明显优于本研究中使用的传统音频感应线圈。ILA系统不规则的高频响应可能是造成这种差异的原因。当调频适配器与体式助听器配合使用时，助听器感应线圈的频率响应以及适配器的位置决定了助听器的整体性能。
