Amazon.com: VLIKE LCD Digital Audio Decibel Meter Sound Level Meter Noise Level Meter Sound Monitor dB Meter Noise Measurement Measuring 30 dB to 130 dB A/C Mode (Batteries Not Include) : Industrial
EBTOOLS Decibel Tester,Noise Monitor,SMART SENSOR AS844+ Sound Level Meter LCD Digital Decibel Meter Noise Monitor With Data Storage Function - Walmart.com
Science with a Smartphone: Decibel Meter - Scientific American
SLM25TK Sound Level Meter with Data Logging Function Measure 30dB~130dB and CD Software - Tekcoplus Ltd.