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 5925-01-541-8343
NSN 5835-00-552-0734
NSN 5960-01-617-6345
NSN 6320-00-994-0179
NSN 5960-00-786-7967
NSN 5990-00-899-1662
NSN 5910-01-462-2440
NSN 5910-01-186-0672
NSN 6135-00-728-9860
NSN 5925-01-210-1678
NSN 5910-01-221-5273
NSN 5895-01-232-1164