Verifying Ear Level FM Systems

Affinity 2.0 Support

Ear Level FM systems are intended to be used by patients who have normal or near-normal hearing and help increase the signal to noise ratio. They can be used, for example, in classroom settings for a child having learning difficulties or auditory processing disorders (APD). Typical use will include an ear-level FM receiver, coupled to a thin tube, in an open ear configuration. The steps below guide clinicians on how to perform straightforward realear verification of the ear level FM system, in order to verify the maximum output and the recommended volume setting for the FM receiver.

Prepare the patient for normal real ear: Position patient in front of the Affinity loudspeaker Place the probe tube in the ear Position the ear level FM receiver on the ear

Position patient in front of the Affinity loudspeaker

Place the probe tube in the ear

Position the ear level FM receiver on the ear

From Noah or from the Affinity Suite AUD screen, enter the audiogram. The audiogram will be within the range of normal/near normal.

Once in the REM screen, select the “Ear Level, FM only” protocol from the drop down list.

Place the FM transmitter microphone inside the test chamber, facing the reference microphoneNOTE: The test box reference microphone is the active microphone