英文關鍵字
ampere
amperemeter
amplifier
audio
closeup
control
dashboard
decibel
device
dial
display
electric
electrical
electricity
electronics
element
endless
equalizer
equipment
gauge
graduation
graph
hifi
illumination
indicator
information
instrument
interface
level
levels
loop
loud
loudness
max
maximum
measure
measurement
measuring
meter
metrical
minimum
monitoring
music
nobody
noise
old
panel
peak
pointer
power
radio
reading
real
recording
scale
science
seamless
signal
sound
speech
stereo
technology
time
unit
vintage
volume
wave