noisesensor
nounUK /ˈnɔɪz ˌsɛnsə/
US /ˈnɔɪz ˌsɛnsər/
A noise sensor is a small tool that hears how loud a sound is.
The noise sensor turned red when the music got too loud.
OTHER MEANINGS
2. A device in a car that listens for loud sounds to trigger an alarm.
The car's noise sensor set off the alarm when a truck backfired.
3. A part of a smart home system that measures room loudness and adjusts devices.
The noise sensor told the smart lights to dim when the baby started crying.
4. A scientific instrument that records sound levels over time in an environment.
Researchers placed a noise sensor in the forest to study bird calls.