What does "background noise" mean?

Any sound other than the sound being monitored (the primary sound); a form of noise pollution or interference.

Background noise

Common synonyms include: ambiances, ambient, ambient hum, ambient noise, clutters, environmental noise.

noun

noun ·Rare ·Advanced level

Noun

1
Any sound other than the sound being monitored (the primary sound); a form of noise pollution or interference. countable, uncountable
2
extraneous noise contaminating sound measurements that cannot be separated from the desired signal wordnet