Noise is proof that you're working. Which means that the boss/parent/supervisor won't come over and yell at you for not working. So there is that antianxiety e

Noise is proof that you're working. Which means that the boss/parent/supervisor won't come over and yell at you for not working. So there is that antianxiety effect. Ingrained from an early age. My friend in the trade explained it thus.