Meaning of AUDIO- in English
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 ).
[ audi- (s. of audire to hear) + -O- ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012