英文關鍵字
audio
backdrop
background
backgrounds
calm
concept
cone
deaf
deafness
disabled
ear
earplug
equipment
explosion
foam
guard
gun
hear
horizontal
isolated
loss
loud
muffle
noise
object
orange
pair
pattern
peace
plug
pollution
protect
protection
protective
protectors
reduce
reduction
rubber
safety
shot
silence
soft
sound
studio
swimming
tools
two
vertical
volume
white