Remix of Freesound #67628 Now with tannoy effect (a request).
ultrasonic artifact on video progressively slowed
remix of freesound #182110 with 5 millisecond fade-in and fade-out on each blip
paranoid horn-type car-alarm captured by security camera, some clipping.
remix of Freesound #192448__timbre__hospital-bleep Middle set has nice medium-room-sized reverb
This is a very high frequency sound low pitched.
First take is US Gov public domain sample http://www.archive.org/details/SubmarineDiveAlarm . Then my 2013 variants.
synthesised ping ding with steep attack
synthesised buzz with tremolo , think sliding-door opening/closing on 1970's Dr Who.
annoying very loud bleeps , a bit like phone tones
An alarm inspired by the Utsuho Reiuji one in Touhou 11/12.3! This might have been done with a VST called ...
tannoy-ish effect appled to freesound #245957 by kwahmah-02
The curve has been draved in Audacity and edited