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RM500SL
least 12" away from the FM transmitter*. Put FM transmitter microphone, set to Omni,
within 2mm of the reference microphone in the test box.
5. With the FM transmitter unmuted, repeat step 2. Note that the hearing aid is outside the
test box during this test - Quiet please! The results should be within +/- 2 dB of the
results from step 3. If not, change FM settings and repeat.
* A coupler mic. extension cable is available. See Microphone connection.
Real-ear verification of FM-only open fittings in Speechmap (based on draft AAA Clinical
Practice Guidelines – 2007)
Open fittings must be verified in On-ear mode.
1. Enter Audiometry data and select FM from the Instrument list box.
2. Position the transmitter microphone as in step 4 above. Place the probe tube in the ear
canal and couple the FM-only device to the ear canal as in normal use.
3. At maximum volume setting, select the MPO stimulus. Adjust the receiver settings to
meet targets. See Fitting to targets for loud sounds.
4. At use volume setting, select Speech-std (1) or (2) and choose FM chest (84 dB SPL) or
FM boom (93 dB SPL) for the level. Adjust the FM receiver gain/volume settings to meet
targets in the 1000 – 4000 Hz range.
5. Repeat step 3 at use volume setting.
User's Guide Version 3.4 © June 2011
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