Any kind of noise, no matter what, beeper or white noise included, that you hear routinely becomes a sound you no longer take notice of. No one who works on a construction site depends on noticing such a sound for their safety. That would be crazy. They know better. Meanwhile they have this extra noise they have to hear though to communicate.<br><br>The refrigerator makes a noise while the compressor is on. I don't know when was the last time I noticed.,(reply>), @waswestkan<br>What extra noise? The noise it makes.,(reply>), What extra noise? At the example in the video on noise has been taken away