hum-buzz
noun1
Onomatopoeic A low, continuous, droning sound (like a bee or an idling engine), often indicating a mechanical or electrical noise.
- Speaking so quietly I was confident the ambient hum-buzz and the trio of phone conversations would keep anyone farther than a foot away from eavesdropping.2007 June 23, Vajra, Ragna, Analog 1960-2008:
- [...] you'll end up in the Backrooms, where it's nothing but the stink of old moist carpet, the madness of mono-yellow, the endless background noise of fluorescent lights at maximum hum-buzz, and approximately six hundred million square miles of randomly segmented empty rooms [...]2019 May 12, 4chan, /x/, archived from the original on 12 Jan 2024:
2
Hubbub; busy activity or excitement.