Operation Of A Complete Arrangement For The Testing Of The Earphone - BRUEL & KJAER 4152 Instructions And Applications
Artificial ear for measurement on earphones as used in hearing aids and telephone communication systems. provided with couplers made in accordance with the leg recommendation 126, and various american and german standards.
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Operation of a Complete Arrangement for the Testing of the Earphone.
Fig. 2.1 shows a
typical measuring
arrangement
used to check the frequency
characteristic of
earphones.
4152
t7o¥<%'
Fig.
2.1.
Typical measuring arrangement for the production check of
earphone
characteristics.
It
consists of a Beat Frequency
Oscillator
Type
1022
toge
ther with a Level
Recorder Type 2305 and a
Measurin
g
Amplifier Type
2606.
The adjustment
of the different
ins
truments
are
made
as
follows
:
Adjustment
of
the Oscillator.
1. Turn the toggle switch marked POWER to
"On" and adjust
the frequency
scale as described in the Instruction Manual for the Type 1022 under
"Operation".
2.
Set the frequency
scale
pointer
to
1000
Hz.
10
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