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Page Title:
Appendix D: Noise Level Test Procedure |
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|  MIL-C-70724(AR)
APPENDIX D
NOISE LEVEL TEST PROCEDURE
SCOPE
10.0
10.1 Scope. This appendix gives test procedures for
performing the Noise Level Test.
APPLICABLE DOCUMENTS
20.0
This section is not applicable to this appendix.
PURPOSE
30.0
30.1 Purpose. To compare the noise level of test cartridges
with the noise produced by control cartridges and to measure the
noise level at the gunner's head position.
EQUIPMENT
40.0
40.1 Equipment. Equipment used in this test shall be
approved by the Government (see 6.3) prior to testing.
40.2 Weapons and Blank Firing Attachments. weapons and
Blank Firing Attachments shall conform to the dimensions shown on
the applicable drawings.
TEST PROCEDURES
50.0
The following
50.1 Pre-firing (preparation for test).
procedure shall be followed:
a. Test and control cartridges shall be loaded into
magazines, and conditioned at 70 2F for a minimum of two
hours.
b. The weapon shall be assembled in the test fixture on
the mount.
c. A noise level meter is set up outside the firing room
with a microphone placed inside the firing room.
d. A second microphone is placed at the right handed
gunner's head position.
D-1
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