英文關鍵字
acoustic
audio
background
bass
black
blank
box
center
circle
color
copy
dark
decibel
diaphragm
electrical
electronics
entertainment
equipment
fabric
fluctuation
gray
image
listening
loudspeaker
music
musical
nightclub
nightlife
nobody
object
people
plastic
public
recording
single
sound
space
speaker
stereo
studio
system
technology
tweeter
vibration
volume
woofer