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Decibel Meter Sound Level Reader 30-130dB(A), Hand-held Sound Noise Meter with Backlight Alarm, Digital Noise Meter Decibel Monitoring Tester Calibrated Audio Noise Volume Measuring Instrument: Amazon.com: Industrial & Scientific
Why can lightning be heard for 12 miles or so but a gun can only be heard from 2-3 miles away when a gun is more decibels? - Quora
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2 Pack Solar Security Alarm Lights, 129dB Gunshot Sounds & Dog Barking Sound & Light Strobe Light Warning Lamp for Outdoor Farm Barn, Villa Yard - Walmart.com
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