Frequency Modulation (FM) Systems
How to pronounce:
friːkwənsi ˌmɒdjʊˈleɪʃən ˈsɪstɪmz
Definition:
An assistive listening device is worn by the speaker to amplify his/her voice and transmit it directly to the listener’s ears via an electronic receiver and special earphones or the listener’s own hearing aids to reduce the problem of background noise interference and the problem of distance between the speaker and hearing-impaired listener.