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SERVICE
Instructions on how to replace and adjust the TwinMic System for
BTE instruments
Please make sure you have received special training by S.A.T. Erlangen prior repairs on the TwinMic System.
When the TwinMic System has to be replaced comparison measurements as well as omni-/directional measure-
ments is required. Necessary measuring equipment:
PC, HIPRO, FONIX 6500 Test system, HICOSS (Service Software) V7.0 or higher, SIFIT V7.0 or higher.
1. Never separate the microphone pair (Order No. 10 598 794). The complete pair must be replaced. If one
microphone fails both microphones must be replaced.
2. Front (Mic1) and Rear (Mic2) test and adjustment:
a) Input sound pressure level (Fonix): 60 dB
b) The gain is adjusted automatically through HICOSS.
(Calibration: Mic1/F11, Mic2/F12)
c) Positioning the hearing instrument:
All microphones in the FONIX 6500 must have equal distance to the loud speaker and must show to the left
side.
For further details see following sides.
3. The following matching conditions must be:
Pos.
Criterion
1
Frequency response Mic1/F11 (FRONT)
2
Frequency response Mic2/F12 (REAR)
3
Mic1 minus Mic2 (average difference between 500 - 1000 Hz/6 frequen-
cies), if necessary modify Mic2 with amplitude shifter (Rear/F12)
4
Phase compensation over automatic Adaption
Manufactured by
Sivantos GmbH
Henri-Dunant-Strasse 100
91058 Erlangen
Germany
under Trademark License of Siemens AG.
www.bestsound-technology.de
www.bestsound-technology.com
Replacing the Twin Microphone
Target value
0.5 dB
Bezugsnummer:
Ersetzt Ausgabe:
Reference number:
Replaces edition:
D00095838
2014-03-21
Life 5mi
Tolerance
-
-
-
-
± 0.15 dB
-
-
Ausgabe/Edition:
2014-10-31
Seite/Page:
13/16
Life 5mi
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