Answer:

phon

Answer	Crossword Clue
PHON	Unit of loudness
PHON	Sound unit
PHON	Loudness measure

PHON	Speech sound study: Abbr.
PHON	Loudness unit
PHON	Decibel-intensity measure
PHON	Sound: Comb. form.
PHON	Study of speech sounds: Abbr.
PHON	Sound: Prefix.
PHON	Unit of loudness.
PHON	Sound: Prefix

PHON	Study of speech sds.
PHON	Sound measure
PHON	Tone: Comb. form
PHON	Unit measuring loudness

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.