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|Noun||1.||acoustic device - a device for amplifying or transmitting sound|
bell - a hollow device made of metal that makes a ringing sound when struck
birdcall - a device for imitating a birdcall
device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
ear trumpet, hearing aid - a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
megaphone - a cone-shaped acoustic device held to the mouth to intensify and direct the human voice
mouthpiece - an acoustic device; the part of a telephone into which a person speaks
mute - a device used to soften the tone of a musical instrument
muffler, silencer - a tubular acoustic device inserted in the exhaust system that is designed to reduce noise
siren - an acoustic device producing a loud often wailing sound as a signal or warning
slapstick - acoustic device consisting of two paddles hinged together; used by an actor to make a loud noise without inflicting injury when striking someone
speaking trumpet - a trumpet-shaped acoustic device to intensify and direct the human voice; formerly held to the ear by a hard-of-hearing person
whistle - acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound