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Digital Sound Level Meter (Range: 30 to 130 dB) for Auditoriums, Vehicle Noise Testing, Theatres, Schools Along with Factory Calibration Certificate Model: Lutron SL-4030: Amazon.com: Industrial & Scientific
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Digital Sound Level Meter,Sound Meter For Classroom Home Street,30-130DBA DB Meter to Measure Noise,Noise Decibel Reader - Walmart.com
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