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 5990-01-216-0148
NSN 6145-01-139-5172
NSN 2925-01-214-5333
NSN 5835-01-449-7511
NSN 5905-01-357-7001
NSN 4140-00-849-2930
NSN 5999-00-295-4898
NSN 5855-00-494-9581
NSN 5895-01-264-4646
NSN 6145-00-081-2797
NSN 5935-00-989-0294
NSN 6240-01-472-0868