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Open fit hearing aid testing
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fmGenie accessories tester
Testing Microphones
fmGenie style with a 2.5mm jack plug – Socket A
Plug in the microphone, talk into it at the normal
distance from the mouth. Listen to the tester and
increase the volume until sound is heard. Wiggle
and bend leads as before.
Connevans microphones have a detachable head which rarely fails so we
advise trying a replacement lead before failing the whole microphone.
Testing direct input leads connected to a radio aid
The radio aid system should be turned on and the direct
input lead connected as normal.
Instead of plugging into the direct input shoe on the
hearing aid, plug the 3 pin Europlug into socket B of the
tester. Place the
near a source of sound and listen to the
tester, increasing the volume until sound is heard. Then
walk away from the
to a realistic operating distance.
Gently wiggle the lead as before. If there is a problem, as
part of the elimination process, replace the direct input lead
with a known good one and listen again.
Testing Ear Level Wireless Receivers
To test ear level receivers, turn on the matching transmitter.
Plug the ear level receiver into the tester and turn on.
Place the transmitter near a radio or other sound source,
listen to the tester adjusting the volume as required. Walk
away from the transmitter to check that it works at a
realistic operating distance.
Lastly gently squeeze the ear level receiver to check for intermittent
connections which can cause crackling or broken sound.
Fault finding is a process of elimination and substitution. Having more than
one fault is potentially the most confusing situation. Using the Connevans
radio aid accessories tester allows easy verification that individual parts of
an fm system are working or not.
To avoid confusion always replace or wiggle one item at a time. If you have
access to known working items, try substituting them one at a time.
Sometimes it may be helpful to borrow items from another user, listening to
their transmitter can help clarify what is working.
Operation
1
Plug the headphones into the
accessories tester headphone socket.
2
Plug an fmGenie microphone into
socket ‘A’ on the Accessories Tester
and set the volume to a comfortable
level.
3
Insert the fmGenie microphone into
the end of the adaptor marked ‘Mic’.
4
Check that the dome of the ‘open fit’ is
clean and insert into the end of the coupler
marked ‘HA Open fit’ taking care not to
damage or squash the dome.
Turn on the hearing aid and talk into the
microphone.
Listening through the headphones you will be able to hear the output of
the hearing aid. You will also be able to hear when an ear level or body
worn fm radio aid receiver is connected and the beeps from the hearing aid
when you change programmes.
The ‘open fit’ end of the listener is stepped so that it can accommodate
different size domes.
We recommend cleaning the listener with an alcohol wipe after each test, to
prevent contamination.
Open Fit Hearing Aid Testing
Part no. FMG750
Open fit hearing aids often do not produce enough sound
to allow testing by a normally hearing person using a
stetoclip. To cover this problem, Connevans produce a
handy little adaptor which allows you to listen to open fit
hearing aids with a Radio Aid Accessories Tester using an
fmGenie microphone.
