Crossword clues for the word: PHON The word PHON has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for PHON Showing 1 to 9 of 9 results Clue(s) Decibel-intensity measure Loudness unit Sound prefix Speech sound study: Abbr. Study of speech sds. Study of speech sounds: Abbr. Tone: Comb. form Unit measuring loudness Unit of loudness