MIL-PRF-87819/1B
TABLE II. Performance characteristics.
1/
Inspection
Qualification
Group A
Group B
Group C
test
Subgroup 1
Visual and mechanical
X
X
X
Acoustic quality
X
X
X
Attenuation (Qualification)
X
Attenuation (Conformance)
X
Speech intelligibility
X
Headset system sensitivity
X
X
Subgroup 2
Headband pressure
X
X
Headband flexing
X
X
Twist and pull
X
X
Shock (drop)
X
X
X
Fungus
X
Vibration
X
Temperature
X
X
Subgroup 3
Temperature shock
X
X
Humidity
X
X
Salt fog
X
X
2/
Cold-environment shock
X
X
Subgroup 4
Cable isolation
X
X
1/ See MIL-PRF-87819, for inspection details.
2/ The Cold-environment shock test appears only in MIL-PRF-87819/1 (see Requirements).
Intended use. Headset-microphone PIN M87819/1-01 is a high ambient noise level headset-microphone
designed for use by ground personnel to provide communication under the extreme noise conditions
encountered in close proximity to fighter, transport, and tanker aircraft engines, both on the flight-line and
in engine-test shops, for periods of time required by normal duty work-shifts. The noise-attenuation
requirements in this document were developed by the Acoustics / Noise Control (Air Force Research
Laboratory) Wright-Patterson AFB, OH. It is strongly recommended that earplugs be worn in conjunction
with these headsets.
Changes from previous issue. The margins of this specification sheet are marked with vertical lines to
indicate where changes from the previous issue were made. This was done as a convenience only and
the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and
contractors are cautioned to evaluate the requirements of this document based on the entire content
irrespective of the marginal notations and relationship to the last previous issue.
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