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Section 2: RealEar evaluation with FM system
Environmental microphones on body-worn receivers
1.
Arrange the reference microphone and FM receiver environmental microphone as
described in Section 1.4.3. The FM receiver will be six inches from and facing the
loudspeaker.
2.
Choose a place to stand during testing, preferably away from the loudspeaker and
microphone. Hold the remote module so that you can operate the test. Stand precise-
ly in this place during both leveling and testing.
3.
Press [LEVEL]. This levels the sound field speaker.
4. Remove the reference microphone from the sound field. It will not be used for test-
ing so you can lay it to one side.
5.
Mark the probe tube to ensure the desired insertion depth, and place it and the ear
piece of the receiving unit in the client’s ear. The insertion depth of the probe tube
should be the same as used to test the client’s hearing aid The client should be at
least 2 ft (60 cm) from the loudspeaker to avoid being in the sound field. 6.
You are
now ready to test the environmental microphone on a body-worn receiver.
Environmental microphone on a hearing aid
When the environmental microphone is on the hearing aid itself or at the ear level, use the
real-ear setup described in Section 2.1.1.
