hydrophone
thermophone
speaker unit
speaker
speaker system
loudspeaker system
loudspeaker
microphoning
acoustic device
electro-acoustic transducer
telephone set
sounder
telephonograph
phone
telephone
electrophone
microphone
mic
mike
leadline
diaphragm
phonautograph
audio system
sound system
gobo
diving scooter
glub
bleep
sonar
-phone
bullhorn
loud-hailer
loud hailer
earpiece
electric dulcimer
acoustic coupler
earphone
headphone
snapper
sonobuoy
jack plug
pizzicato
auscultoscope
matrix mixer
hearing aid
sonifier
sea scooter
ear trumpet
expander
pseudophone
booster
pallograph
relay link
relay transmitter
relay station
booster station
fipple
booster amplifier
studio monitor
radio
line out
ribbon microphone
optoisolator
sonograph
audio amplifier
whistle
video equipment
megaphone
pipe
electromechanical transducer
power mic
speaking tube
reel-to-reel tape recorder
sirenlike
geophone
phonorecord
active subwoofer
television equipment
electromagnetic transducer
chime
CTD apparatus
sonorous
crystal mike
electrophonic
queep
crystal microphone
detectograph
subwoofer
deaf-aid
vibrograph
phaser