əˈku:stɪk adj. & n. --adj. 1 relating to
sound or
the sense of
hearing. 2 (of a
musical instrument,
gramophone, or recording)
not having
electrical amplification (acoustic guitar). 3 (of
building materials) used
for soundproofing or modifying sound. 4
Mil. (of a mine)
that can be exploded by sound waves transmitted
under water. --n. 1 (usu. in pl.) the properties or qualities (esp. of a
room or
hall etc.) in transmitting sound (good acoustics; a
poor acoustic). 2 (in
pl.; usu. treated as sing.) the
science of sound (acoustics is not
widely taught). øacoustic
coupler Computing a
modem which converts
digital signals
into audible signals
and vice versa, so that the former can be transmitted and received
over telephone lines. øøacoustical adj. acoustically adv. [Gk akoustikos f. akouo hear]