| 释义 |
acous·tic
I. \əˈküstik, -tēk also -kyüs- or -kau̇s-\ adjective
or acous·ti·cal \-ə̇kəl, -ēk-\
Etymology: acoustic from Greek akoustikos of hearing, from akoustos heard, audible (from akouein to hear) + -ikos -ic; acoustical from acoustic + -al — more at hear
1.
a. : of, relating to, adapted to, or affecting the sense of hearing or the organs of hearing
< the acoustic apparatus of the human ear >
— compare auditory, aural
b. : of or relating to sound or sound waves
< the acoustic intensity of a shrill voice >
: deriving from sound
< acoustic energy >
c. : controlled or actuated by sound or sound waves
< the ship was blown up by an acoustic mine >
d. : influencing sound or sound waves (as in direction or speed)
< their voices rang back from the acoustic barrier of the high cliff before them >
e. : of, relating to, or concerned with acoustics
< acoustic engineering >
: specializing in acoustics
< an acoustic contractor >
2.
a. : made for, designed for, or having the quality of facilitating or improving the perception of sound
< a tiny acoustic device very efficient in promoting hearing >
: designed or serving to produce, carry, or diffuse sound
< a highly efficient acoustic system >
b. : made for, designed for, or having the quality of controlling sound; especially : designed to eliminate or lessen noise and other unwanted sound (as reverberations or echoes) : noise-absorbent or sound-absorbent
< an acoustic ceiling >
< acoustic wallboard >
< acoustic tile >
3.
a.
(1) : of, relating to, adapted to, or produced by a method of recording sound by the use of a thin diaphragm vibrated directly by sound waves, the vibrations being in turn transmitted directly by the diaphragm to a recording stylus that cuts corresponding grooves (as in a revolving disc)
(2) : of, relating to, adapted to, or produced by a method of reproducing sound by the use of a reproducing stylus whose vibrations are transmitted directly to a thin diaphragm, the corresponding vibrations of the diaphragm being directly amplified to produce audible sound
< an acoustic recording >
— compare electric 1b
b. : of, relating to, or adapted to measurement of depth (as of the ocean) by means of sonic or ultrasonic vibrations
< acoustic soundings >
• acous·ti·cal·ly \-k(ə)lē, -li\ adverb
II.
variant of acoustics
III. adjective
1. also acoustical : of, relating to, or being a musical instrument whose sound is not electronically modified
2.
a. : being a musical group or performer that uses acoustic instruments
b. : being or involving a musical performance on acoustic instruments
IV. noun
(-s)
Etymology: acoustic, adjective (herein)
: an acoustic musical instrument (as a guitar) |