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for medical diagnosis or imaging), sonar, and sound reproduction. It is an important consideration with the use of ultrasound (e.g.

The prevention or reduction of background noise is important in the field of active noise control. Background noise is an important concept in setting noise levels.īackground noises include environmental noises such as water waves, traffic noise, alarms, extraneous speech, bioacoustic noise from animals, and electrical noise from devices such as refrigerators, air conditioning, power supplies, and motors.

Background noise is a form of noise pollution or interference. For cinematic applications, see noise criteria.īackground noise or ambient noise is any sound other than the sound being monitored (primary sound).