Alarmsone-shot · 4.05 s
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Parking Sensor Beep
A parking sensor beeping faster and faster as an obstacle gets closer, short steady-tone pulses
loop · 4.00 s · 0 downloads · 0 likes
0.00 / 4.00 sSoft low tone
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get 8EGHCHE9KA@1 --preset soft-chime -o parking-sensor-beep.wav
How it's made
- Source
- a small piezo sounder driven by a gated square-ish wave. The fundamental sits at 0.8-2.4 kHz; the drive adds weak 2nd and 3rd harmonics (0.3 and 0.12 of the fundamental) that `tone` shifts around.
- Body
- the sounder sits in a bumper housing that acts as a broad resonance one octave above the fundamental (peak, Q about 1.5, +3 dB), and a gentle low-pass keeps the top end from turning shrill.
- Envelope
- every beep is a gated tone with 6 ms raised ramps, so the gate never clicks. The gap between beeps shrinks from `far` to `near` seconds following the obstacle distance, with a curved approach; the duty cycle keeps each beep a fixed fraction of its period so the pulses stay short at high rates.
- Rhythm
- beep times are computed once from the loop length, so the 4 s render holds one full approach and the loop restarts at the far, slow spacing.
- Variation
- `rng` detunes each beep by about 0.3 % and its level by a few percent, as a cheap driver does.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| pitch | 600 – 2400 | 1100 | Hz | Pitch |
| far | 0.3 – 1 | 0.65 | s | Far spacing |
| near | 0.06 – 0.25 | 0.1 | s | Near spacing |
| duty | 0.25 – 0.8 | 0.5 | — | Beep length |
| tone | 0 – 1 | 0.4 | — | Harshness |
| shape | 0.8 – 3 | 1.5 | — | Approach curve |
| 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
- r12026-10-24engine 1.0.1use('8EGHCHE9KA@1')