acoustica‧cous‧tic /əˈkustɪk/ ●○○ adjective 
1
relating to sound and the way people hear things2eng. lang. arts an acoustic musical instrument is not electric: 
an acoustic guitar [Origin: 1700–1800 Greek akoustikos “of hearing,” from akouein “to hear”]
1 relating to sound and the way people hear things2eng. lang. arts an acoustic musical instrument is not electric: an acoustic guitar [Origin: 1700–1800 Greek akoustikos “of hearing,” from akouein “to hear”]
