A digital alarm sound or a space laser blast.
A old style bell style alarm clock.
A short alarm sound played on a kazoo.
A synth alarm build up in intensity.
single mid tone clown or comedy horn blast.
A short loop of a warning alarm sound.
A short, space engine low-pitched alarm loop.
A series of 4 high pitched sonar beeps.
A single low pitched clown or comedy horn blast .
Buzzer - deep, reverberant, spacious.