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
Bezugsnummer:
Reference number:
D00095838
Ersetzt Ausgabe:
Replaces edition:
2014-03-21
Ausgabe/Edition:
2014-10-31
Life 5mi
SERVICE
Life 5mi
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Replacing the Twin Microphone
Seite/Page:
13/16
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
Target value
Tolerance
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)
0.5 dB
± 0.15 dB
4
Phase compensation over automatic Adaption
-
-
