MIL-DTL-83511/5A
Frequency in Hz
Response
Variation
300 - 500
4
2.5
500 - 2,000
4
4
2,000 - 4,500
5
4
NOTES:
1. Item identification: The headset-microphone H-172A/AIC is a single earphone headset-microphone
assembly with a transistorized microphone amplifier located in one earcup, which is perforated to
provide ambient listening. The assembly incorporates a quick disconnect cord assembly. The
quick disconnect provides a means to attach a switch and cord to the output connector for
termination of the headset-microphone assembly.
2. Attachment provisions: The earcup containing the earphone and the earcup containing the
transistorized amplifier for the microphone shall be suspended by yokes from the headband, to
allow quick adjustment and suitable pressure to the user.
FIGURE 2. Test circuit (microphone amplifier).
2
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