Wiktionary
a. 1 (context obsolete English) Of or pertaining to the radiophone 2 Describing sound effects created to accompany radio broadcasts as background music 3 Describing a type of sound art practice that extends the established radio drama and documentary form by the use of sonic abstractions. Perhaps first used by (w: Pierre Schaeffer) in his ''Essai Radiophoniques'' and subsequently taken up by the BBC to describe their famous (w: BBC Radiophonic Workshop).
WordNet
adj. relating to or by means of radiotelephony [syn: radiotelephonic]
Usage examples of "radiophonic".
Over the roar of wind there was a faint bubbling radiophonic noise from the body of the object.
Again the radiophonic bubbling sound, now slightly raised in pitch, drifted across the frozen waste.
Ahankk shouted, rudely jerking Jason from his radiophonic communication by grabbing his arm.