A old style bell style alarm clock.
A short alarm sound played on a kazoo.
Rhythmic low pitch spacecraft alarm sound
Soft mid pitch note repeating
An analog siren effect made with a Juno synthesizer.
A series of 4 high pitched sonar beeps.
Buzzer - reverberant, prison or cell block.
Echoing synthesized chirp sound, sound design.
1960s style alarm clock bell ringing.