Introduction to FM Systems

MED-EL offers a wide range of adapter cables for use with frequency modulated systems (FM systems), battery-operated devices such as portable CD players, and assistive listening devices (ALD). The TEMPO+ speech processor can be connected to these devices using either the Angled Battery Pack or the Remote Battery Pack.

This information, intended for MED-EL recipients, teachers, technical personnel and audiologists, presents an overview of compatible FM systems, information on connection and recommended settings.

An FM system consists of two basic components: an FM transmitter with a microphone and an FM receiver. For optimal benefit, the microphone should be positioned close to the speaker, e.g. teacher. Due to the close position of the microphone to the sound source, background noise and reverberated sounds are greatly reduced.

The FM transmitter amplifies and modulates the sound signal and sends it to the FM receiver via radio wave. The FM receiver demodulates the signal and transmits it to the speech processor (see fig. 1). For the CI recipient, the sound quality is the same as if the person were speaking directly into the speech processor’s microphone.

		About Difficult Listening Environments One or two sentences to describe this section. Using the FM System One or two sentences to describe this section. Connecting the FM System One or two sentences to describe this section. ITrouble shooting Information One or two sentences to describe this section. Information for download One or two sentences to describe this section.