Siren / Alarm Generator
A looping siren tone that sweeps smoothly between two pitches — adjust the range and sweep speed to taste.
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About this tool
The pitch glides smoothly up and down between your two chosen frequencies once per sweep period, following a smooth sine curve rather than jumping abruptly — the same wailing shape used by emergency vehicle sirens the world over.
Choose a style: wail rises and falls slowly, yelp sweeps quickly, and hi-lo alternates between two tones like a UK ambulance. The sweep is generated continuously, so it loops seamlessly at any speed, and the volume starts low.