acoustic Meaning in the Cambridge English Dictionary
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Meaning of “acoustic” in the English Dictionary

"acoustic" in British English

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acousticadjective

uk   us   /əˈkuː.stɪk/
relating to ​sound or ​hearing: The ​microphoneconverts acoustic ​waves to ​electricalsignals for ​transmission. used to refer to a ​musicalinstrument that is not made ​louder by ​electricalequipment: an acoustic ​guitar

acousticnoun [C usually plural]

uk   us   /əˈkuː.stɪk/
the way in which the ​structure of a ​building or ​roomaffects the ​qualities of ​musical or ​spokensound: The ​concert was ​recorded in a ​church that is ​famous for ​its acoustics.
acoustically
adverb uk   us   /-stɪ.kəl.i/
(Definition of acoustic from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"acoustic" in American English

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acousticadjective [not gradable]

 us   /əˈku·stɪk/
relating to ​sound or ​hearing: Scientists have ​developed a ​tiny acoustic ​device to ​improvehearingaids. An acoustic ​musicalinstrument is one that is not made ​louder by ​electricalequipment. Acoustic also ​meansdesigned to ​controlsound so that you can ​hear only the ​sounds you ​want to ​hear: acoustic ​tile
(Definition of acoustic from the Cambridge Academic Content Dictionary © Cambridge University Press)
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