Maico MA 50, Руководство по эксплуатации

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Operating Instructions MA 50
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2 Description
The MA 50 is an audiometer for pure tone audiometric tests. It can be used
for ENT diagnostics in the office, and for mobile audiometry in clinics, homes
and abroad.
Tests can be performed using the TDH 39 headphones (AC), B 71 bone
conduction receiver (BC) or optional insert phones. Built-in test signals are
pure tone, pulse tone, warble tone and narrow band noise.
The MA 50 audiometer delivers 11 air conduction (AC) test frequencies from
125 Hz to 8 kHz, with levels from -10 dB
HL
to 120 dB
HL
.
Bone conduction (BC) can be tested with 11 test frequencies from 125 Hz to
8 kHz with levels from -10 dB
HL
to 70 dB HL (with the standard bone
conductor B 71 the frequency range is limited from 250 Hz to 6 kHz).
The optional insert phones EAR 3A submit levels from -10 dB
HL
to 120 dB
HL
with 11 test frequencies from 125 Hz to 8 kHz.
The hearing level is controlled independently for the signal and the masking
channel by two detented knobs on the left and right of the instrument which
can be operated from the side or the top. The level steps are 5 dB. The signal
STIM bar and the frequency up/down keys are just beside the level control
knobs for easy one handed control of level, frequency and signal
presentation.
The bright LED-display shows level and frequency for each channel.
As a result of modern microprocessor technology, the MA 50 is easy to use
and is extremely reliable.
The audiometer is designed to be extremely service friendly. Automatic test
programs make trouble shooting and the yearly calibration as easy as
possible.
PC-Interface:
A serial RS 232C interface for data transfer to a connected computer is built
in. The optional MAICO-audiometry module for NOAH enables the
automatic data transfer of all test results of the MA 50, likes tone audiogram.
For more information see chapter 7.