audio-

1. a combining form used in the formation of compound words, with the meanings: “sound within the range of human hearing” (audiometer); “hearing” (audiology); “sound reproduction” (audiophile).

combining form

1. indicating hearing or soundaudiometer; audiovisual

word-forming element meaning “sound, hearing,” from comb. form of Latin audire “hear,” (see audience); first used in English as a word-formation element 1913.

pref.

1. Hearing:audiology.
2. Sound:audiogenic.