Alarmsone-shot · 4.05 s
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Smoke Detector Chirp
One short high piezo chirp from a smoke detector with a low battery, with a thin edge and tiny disc ring.
one-shot · 0.23 s · 0 downloads · 0 likes
0.00 / 0.23 sSmall bright disc
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get 7JX2P4CX3D@1 --preset compact -o smoke-detector-chirp.wav
How it's made
- Source
- a battery-powered piezo disc driven for 85–165 ms near 2.7–4.1 kHz, in one pulse.
- Body
- the disc favours its fundamental; weak 2x/3x drive harmonics add a thin electrical edge. A 1.63x housing mode and band-limited startup noise die within 14–24 ms, below the main tone.
- Envelope
- a 2.5 ms startup and 4 ms switch-off feed a Q=16 disc resonance with a short free ring. Supply sag reduces level during the pulse; all output fades out before 0.22 s, followed by silence.
- Modulation
- a 10 ms settling bend falls into tune, then a 0–1.8 percent downward supply drift.
- Variation
- seeded disc tuning varies by 0.15 percent. Pitch, pulse width, harmonic edge and supply sag distinguish a standard detector, small bright disc, depleted battery and lower damped housing.
- Space
- dry mono point source; no room reflections or repeated alarm pattern is baked in.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| pitch | 2700 – 4100 | 3200 | Hz | Disc pitch |
| pulse | 0.085 – 0.165 | 0.14 | s | Pulse length |
| edge | 0 – 1 | 0.45 | — | Electrical edge |
| sag | 0 – 1 | 0.35 | — | Battery sag |
| seed | int | 1 | — | Variation, reproducible |
The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.
Revision history1
- r12026-10-25engine 1.0.1use('7JX2P4CX3D@1')