volume unit

noun

1. a logarithmic unit used to measure the magnitude of a sound wave.

Word History and Origins

Origin of volume unit¹

First recorded in 1935–40

Example Sentences

Each variable air volume unit then adjusts the air flow for its specific zone.

From Scientific American

This isn’t exactly a definitive statement, but if Dell wants to tap into this volume unit opportunity that I believe will be larger than notebooks, they need to do something here.

From Forbes