Pocket-sized noise indicator

摘要

The Noise Indicator Nl-I 100EU from 3M aims to offer easy, durable noise level detection, helping identify areas where hearing protection may need to be worn. It uses an LED lighting system, which flashes green when exposed to ambient noise levels below 85db(A) and red for noise levels above 85dB(A), when hearing protective equipment must legally be worn. The company says that the indicator's small size and lightweight design make it ideal for workers in a variety of industries. It uses a rechargeable battery that operates for up to 200 hours between charges and has an automatic turn-off system.