英文關鍵字
amplifier
amplitude
analysis
analyzer
audio
cardiogram
channel
conference
digital
download
equal
equalizer
equipment
form
frequency
icon
led
lights
listening
live
mixer
mp3
music
oscillation
peaks
player
projector
radio
sound
soundwaves
speaker
spectrum
stereo
streaming
system
video
visual
wave
waveform
wavelength
waves