MIL-PRF-87819B
3.5.14 Cable isolation (see 4.7.15). The cable assembly with connectors shall demonstrate at lease 60
dB of electromagnetic and electrostatic isolation (see 6.8.3) between the microphone and earphone
circuits, when subjected to the frequencies as specified.
3.5.15 Salt fog (see 4.7.16). The product shall completely resist failure of any kind due to corrosion,
when subjected to extremes of salt-atmosphere. Following exposure to such conditions, the acoustic
quality shall be as specified in 3.5.1.
3.5.16 Foreign object damage (FOD) hazards. The headband shall be designed to avoid any and all
FOD hazards. It shall not use any small parts which may become fully detached during normal military
use, including, but not limited to: c-clips at the earcup yoke attachment, nuts which can come loose from
their bolt, and non-secured cable retaining clips.
3.5.17 Cable retention. All cabling shall be restrained such that it does not protrude to a distance from
which the cable could become entangled with surrounding equipment during normal use.
3.5.18 Reparability (see 3.4.3). Headsets shall be designed so that components which are expected to
fail are accessible and replaceable, without damaging other components in the process. The replaceable
components shall be: headband pad, earcushion, entire microphone boom assembly (when specified),
earphone elements, 4-conductor cord assembly (console cord), 2-conductor cord (earcup-to-earcup),
earcup shells, and volume control potentiometer and knob. The headset shall be designed such that the
removal and replacement (see 6.1) of replaceable components does not necessarily degrade the pre-
repair performance of the headset.
3.5.19 Interchangeability. All parts having the same manufacturer or military PIN shall be directly and
completely interchangeable with each other, with respect to installation and performance to the extent
specified herein.
3.6 Marking. Marking shall be as specified in MIL-STD-1285. Location shall not interfere with
replacement of the PIN U-174/U connector, as specified (see 3.1), and shall consist of the following:
a. NSN.
b. Military PIN as specified in 1.2 or 6.4.
c. Manufacturer's CAGE and PIN.
d. Contract number.
3.7 Workmanship. The products shall be processed as to be uniform in quality and shall be free from
loose or deposited foreign materials and other defects that will affect life, serviceability, or appearance.
4. VERIFICATION
4.1 Classification of inspections. The inspections specified herein are classified as follows:
a. Qualification inspection (see 4.4).
b. Verification of qualification (see 4.5).
c. Conformance inspection (see 4.6).
4.2 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance
with the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202.
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