Telex ANRTM 150 - Manual (Page 6)

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Figure 3. Headband Pressure Adjustment
7.Volume Adjustment Procedure
The following procedure is recommended to assure that there will
be sufficient radio volume in the event of a loss of power to the
headset.
a. Turn the headset power off.
b. Set the headset volume controls to the middle of their range.
c. USING THE AIRCRAFT RADIO VOLUME CONTROL, adjust
headphone volume for clear communication under typical
operating conditions.
d. Turn on the headset and adjust the volume controls ON THE
HEADSET to achieve clear communication with noise
reduction activated.
Figure 4. Microphone Placement Figure 5. Volume Control