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 5855-00-763-2155
NSN 5855-01-631-5051
NSN 5895-01-622-3162
NSN 5935-00-905-7412
NSN 6150-01-036-4052
NSN 6650-00-624-3686
NSN 7035-00-076-4097
NSN 6620-01-279-8884
NSN 5960-01-227-5245
NSN 6105-01-044-7321
NSN 6130-01-523-8668
NSN 5915-00-139-6710