Synonyms and related words :
Klaxon, Mayday, SOS, acoustical network, aerophone, air-raid alarm, alarm, alarm bell, alarm clock, alarm signal, alarum, alert, all clear, alpenhorn, alphorn, althorn, alto horn, ballad horn, baritone, bass horn, beacon, bell, bellyband, blinking light, boiler factory, boiler room, brass choir, brass wind, brass-wind instrument, brasses, bugle, bugle horn, bull-roarer, burglar alarm, buzzer, capacitor speaker, catcall, cherry bomb, cinch, clack, clacker, clapper, clarion, coaxial speaker, cone, cornet, cornet-a-pistons, corno di caccia, cornopean, cracker, cricket, crossover network, crostarie, diaphragm, double reed, double-bell euphonium, dynamic speaker, earphone, electrodynamic speaker, electromagnetic speaker, electrostatic speaker, embouchure, euphonium, excited-field speaker, fiery cross, fire alarm, fire bell, fire flag, firecracker, five-minute gun, flashing light, fog bell, fog signal, foghorn, full-fidelity speaker, gale warning, girt, girth, gore, headphone, headset, helicon, high-fidelity speaker, high-frequency speaker, hooter, hue and cry, hunting horn, hurricane warning, jockey, key, key trumpet, lighthouse, lip, lituus, loudspeaker, low-frequency speaker, lur, mellophone, midrange speaker, monorange speaker, mouthpiece, moving-coil speaker, noisemaker, note of alarm, occulting light, ophicleide, orchestral horn, permanent magnet speaker, pipe, pocket trumpet, police whistle, pommel, post horn, rattle, rattlebox, reed, sackbut, saxhorn, saxtuba, serpent, signal of distress, siren, slide, slide trombone, sliphorn, small-craft warning, snapper, sousaphone, speaker, speaker system, speaker unit, steam whistle, still alarm, stirrup, storm cone, storm flag, storm warning, surcingle, tenor tuba, ticktack, tocsin, tooter, triaxial speaker, tromba, trombone, trumpet, tuba, tusk, tweeter, two-minute gun, upside-down flag, valve, valve trombone, valve trumpet, voice coil, whistle, whizgig, whizzer, wind, wind instrument, woofer