binaural
adj.
"pertaining to both ears," 1861, from Latin bini "twofold, two apiece" (see binary) + aural. In reference to electronic recordings, from 1933.
〔李〕[bin-（bi-）=two 二；aur=ear 耳；-al a.=of…的→] a. ①of or for two ears 双耳的
〔李〕[bin-;aur;-ala.] a.有两耳的； 用两耳的 ←aur (L auris)=ear 耳