PHON
9
Scrabble
10
WWF
P(3) H(4) O(1) N(1)
NWL/TWL ✓ Collins ✓ WWF ✓
Definition
noun
- (acoustics) A unit of apparent loudness, equal in number to the intensity in decibels of a 1,000-hertz tone judged to be as loud as the sound being measured.
Source: Wiktionary
