Opt 9700 is 1/2 and 1 inch random incidence microphones; octave bands w/center frequency 31.5 hz to 16.0 khz; level range: 10 db to 130 db re 20 upa w/1 in. Microphone, 20 db to 140 db w/1/2 in. Microphone; operating temperature: m10.0/p50.0 deg. C; storage temp.: m40.0/p60.0 deg. C w/batteries removed
An instrument which measures the ratio of electrical power with reference to a predetermined value and is calibrated in units of sound intensity, usually decibels. The value may be expressed by means of a pointer and calibrated dial or a digital readout display. if other than audio frequency ranges, see meter, noise level.
Classification: Parts and accessories of articles of schedule b subheading 9030.39
NSN 5950-00-498-3507
NSN 6620-00-068-2503
NSN 5999-01-391-9479
NSN 6650-01-512-9650
NSN 5920-01-119-3652
NSN 5996-00-483-8348
NSN 5910-01-241-9739
NSN 5920-01-437-7175
NSN 4140-00-242-6465
NSN 5945-01-543-4898
NSN 4140-01-033-0577
NSN 5895-01-262-0696