'audioemission' is formed from the combining form 'audio-' (from Latin 'audīre', meaning 'to hear') and 'emission' (from Latin 'emissiō', from 'emittere', meaning 'to send out').

'audio-' comes from Latin 'audīre' and entered English as a combining form meaning 'relating to sound'; 'emission' comes from Latin 'emissiō' (via Old French/Medieval Latin into Middle English) meaning 'a sending out'; the compound 'audioemission' is a modern technical formation combining these elements.

Initially the roots meant 'to hear' and 'to send out'; the compound has come to mean specifically 'the sending out of sound' in contemporary technical usage.