звукова сигналізація; звуковий сигнал
audible tone
audible knock
audible warning
alarm button
alarm placement
alarm system
alarm unit
automatic chemical agent alarm
Doppler effect alarm
gas alarm / warning
radio alarm signal
WMD alarm (weapon of mass destruction)
air raid siren / alarm
fire extinguishing system sprinkler system and fire alarm system
antitank alarm
assembly formation after an alarm
fire alarm bell
fire alarm light
overflow alarm
visual alarm
circuit alarm
automatic-alarm receiver
emergency alarm system
failure alarm
false alarm
fire alarm
fire alarm system
flag alarm
general alarm system
heat alarm
hijack alarm
light alarm