MIL-PRF-26542/2E
Intended use: This is a noise-canceling dynamic microphone designed for use on a headband type
headset at low altitudes or for use in a pressure type oxygen helmet, and at altitudes where the use of
an oxygen helmet is required. It is not waterproof. The microphone is intended to provide
communication under the noise conditions encountered in military aircraft.
The microphone assembly shall be tested in accordance with the tests listed in table II.
Marking: The microphone element shall be marked with the same PIN (i.e., M-87/AIC). The combined
microphone-cable assemblies PIN (i.e., M26542/2-01, M26542/2-02, M26542/2-03, M26542/2-04) shall
appear on the packaging for that assembly, in accordance with MIL-STD-129 and as shown in table I
below.
M26542/2-
0x
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M prefix and specification sheet number________|
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Dash number
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TABLE I. PIN designations.
*
PIN
Characteristics
M87/AIC
Supplied with microphone element only
M26542/2-01
Supplied with microphone element, boom, and
cable assembly M22442/36-3 (13.00 in).
M26542/2-02
Supplied with microphone element, boom, and
cable assembly M22442/36-4 (16.25 in).
M26542/2-03
Supplied with microphone element, boom, and
cable assembly M22442/36-6 (23.00 in).
M26542/2-04
Supplied with microphone element, boom, and
cable assembly M22442/36-1 (6.25 in).
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