https://www.tradeindia.com/products/digital-noise-level-meter-3376632.html
Digital Noise Level Meter - High Precision Sound Measuring Device | Portable, Low Fuel Consumption,...
Testo India Private Limited - Offering low price Digital Noise Level Meter - High Precision Sound Measuring Device | Portable, Low Fuel Consumption, Durable...
noise level meter
https://www.startech.com/en-us/computer-parts/d130-decibel-meter
Handheld Digital Sound Meter w/Large LCD, Noise/Decibel Level Reader for Server Room/Office, Audio...
Handheld Digital Sound Meter w/Large LCD, Noise/Decibel Level Reader for Server Room/Office, Audio Monitor, 30-130dBA Range, Accurate Min/Max Readings