MIL-DTL-5794C
6. NOTES
(This section contains information of a general or explanatory nature which may be helpful, but is not
mandatory.)
6.1 Intended use. Microphone Units M-6A/UR and M-51/UR are intended to be used in military
aircraft, boats, tanks and vehicles as a part of a boom-suspended or other type of microphone.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of the specification.
b. Type required.
c. Number of first article samples required (10 sample units of each item cited in section 1 are
generally required).
d. Packaging (see 5.1).
e. Marking and shipping of samples.
f. Place of final inspection.
6.3 Tin whisker growth (see 3.3.5.2). The use of alloys with tin content greater than 97 percent, by
mass, may exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from
a day to years after manufacture and can develop under typical operating conditions, on products that
use such materials. Conformal coatings applied over top of a whisker-prone surface will not prevent the
formation of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin
whiskers. For additional information on this matter, refer to ASTM-B545 (Standard Specification for
Electrodeposited Coatings of Tin).
6.4 Subject term (key word) listing.
Acoustical characteristics
Calibrating
Decibels
Frequency response
Grid
Plastic material
Signal spectrum
Sound pressure level
Sound source
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