quadraphonic
adjective/ˌkwɒdrəˈfɒnɪk/
/ˌkwɑːdrəˈfɑːnɪk/
(also quadrophonic)
- (of a system of recording or broadcasting sound) coming from four different speakers at the same time
四声道的；四轨录放音的 Word Origin1960s: from quadri- ‘four’ + a shortened form of stereophonic (see stereo).