Noise level meter; lcd display; type 2 microphone; requires 4 aa batteries; battery life: 8 hours; measurement range: 40 to 140 decibels; field calibration; resistant to magnetic and electrostatic fields; includes ac-300 acousical calibrator kit
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
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