MIL-DTL-24223D(SH)
TABLE I. First article inspection.
Tests
Requirement
Verification
General examination
Dielectric strength
Insulation resistance
Quality of reproduction
Power input
Sound pressure output
Sound pressure distribution
Frequency response
Operation at increased input
Operation at reduced output
Polarity
Endurance
Immersion
Temperature (operating and storage)
Humidity
4.5.9
Salt spray
Vibration
Shock
Stray magnetic field (if required)
Gun blast and Jet blast (if required)
4.2.1 Samples for first article inspection. Three samples shall be subjected to the examination and tests of
TABLE I prior to the start of production, except for LS-397()/SIC. For LS-397()/SIC, one sample shall be examined
and tested in accordance with TABLE II; one additional sample of the LS-397()/SIC loudspeaker assembly, less the
rotatable base, shall have the general examination, dielectric strength, and insulation resistance tests performed in
accordance with TABLE I.
4.3 Sampling for conformance inspection.
4.3.1 Inspection lot. All equipment of the same type presented for delivery at one time shall be considered a
lot. The lot may include the entire contract quantity, or it may be the production of any convenient time period.
4.3.2 Sampling for group B inspection. A sample of loudspeakers shall be selected from each inspection lot in
accordance with MIL-STD-1916, verification level 3.
4.3.3 Sampling for group C inspection. Group C inspection will be required by the command or agency
concerned when the basic design of the equipment or the material of a vital part has been changed. One complete
equipment shall be selected and subjected to the Group C inspection of 4.4.3.
4.4 Conformance inspection.
4.4.1 Group A. Each loudspeaker shall be subjected to the Group A test shown in TABLE II.
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