Van Tasell D J, Landin D P
J Speech Hear Disord. 1980 May;45(2):247-58. doi: 10.1044/jshd.4502.247.
Personally sized inductance loops (mini-loops) now are available for use with an FM classroom amplification system and the student's personal ear-level hearing aid. Frequency response characteristics of five commercially-available hearing aids were assessed 1) using hearing aid test equipment available in most audiology clinics, with the hearing aid on microphone setting and 2) in a public school classroom, with the hearing aid on telecoil setting and operating with an FM mini-loop system. Clinic and classroom characteristics of the conventional FM receiver-insert earphone auditory trainers also were assessed. Results showed that the personal hearing aids' classroom performance could not be predicted from their clinic performance. Results also showed that gain provided by the environmental microphone circuit of the FM receiver-insert earphone units was uniformly higher than that provided by the teacher-microphone signal route.
现在有适合个人使用的电感线圈（微型线圈），可与调频教室扩音系统以及学生个人耳级助听器配合使用。对五款市售助听器的频率响应特性进行了评估：1）使用大多数听力诊所都有的助听器测试设备，将助听器设置为麦克风模式；2）在公立学校教室中，将助听器设置为感应线圈模式，并与调频微型线圈系统配合使用。还评估了传统调频接收器插入式耳机听觉训练器的诊所和教室特性。结果表明，无法根据个人助听器在诊所的表现来预测其在教室中的表现。结果还表明，调频接收器插入式耳机装置的环境麦克风电路提供的增益始终高于教师麦克风信号路径提供的增益。
