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Portable GM1356 Digital Sound Level Meter 30~130 dB Decibel Noise Measurement Tester for Indoor/Outdoor Uses by Tekit - Multi Testers - Amazon.com
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Arduino Sound Level Meter - Measure Sound/Noise Level in dB with Microphone and Arduino
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Sound level meter - Wikipedia
Arduino Sound Level Meter — Maker Portal
Gravity: Analog Sound Level Meter: Amazon.com: Home Audio & Theater
