acoustic /əˈkuːstɪk/ adjective also US acoustical /əˈkuːstɪkəl/ also US acoustical /əˈkuːstɪkəl/ Learner's definition of ACOUSTIC
1
: of or relating to sound or to the sense of hearing声音的;音响的;听觉的 2
a of a musical instrument : not having its sound changed by electrical devices(乐器)不用电传音的,原声的 -
an acoustic guitar原声吉他
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acoustic instruments原声乐器
b : made with or using acoustic instruments原声乐器的 — acoustically
/əˈkuːstɪkli/ adverb