DanielRapp/doppler
:wave: Motion detection using the doppler effect observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4196
- days_rel: n/a
- days_push: 3444
- n_releases_24m: 0
Adoption not part of the score
2393 stars · 176 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A JavaScript library that detects hand motion using the doppler effect, emitting an inaudible ~20kHz tone from speakers and measuring frequency shifts via the microphone. It is a web implementation of Microsoft's SoundWave paper requiring no special hardware.
Use cases
- detect hand gestures with just a microphone and speakers
- implement touchless motion control in the browser
- reproduce the SoundWave doppler motion sensing paper
- build a web demo of ultrasound-based motion detection
- measure doppler shift from microphone input in JavaScript
When to choose
- you want hardware-free motion sensing in a Chrome-based web app
- you're experimenting with audio-based gesture interfaces or academic reproduction
When to avoid
- you need robust, production-grade motion detection
- you must support Firefox or other browsers lacking echoCancellation control
- you need an actively maintained library
Facets
library · maturity abandoned
audio-processing machine-learning computer-vision web-development browser doppler-effect motion-detection web-audio microphone soundwave-paper gesture-recognition algorithms javascript
2 sources
- readme: https://github.com/DanielRapp/doppler · fetched 2026-08-28 · 83512ea8c290
- homepage: https://danielrapp.github.io/doppler/ · fetched 2026-08-29 · 4b123222220c
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| DanielRapp/doppler | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="DanielRapp/doppler")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem