qua•draph•o•ny(kwo draf′ə nē),USA pronunciationn.high-fidelity sound reproduction involving signals transmitted through four different channels. Also called quad•ra•phon•ics(kwod′rə fon′iks),USA pronunciationquadriphonics, quad•ra•son•ics(kwod′rə son′iks),USA pronunciationquadrisonics.