Private acoustic field kit
See what a tiny
classifier hears.
Collect three sounds, reveal their visible fingerprints, then challenge a simple nearest-neighbor model—without sending a recording anywhere.
Open the field kit- Local only
- Works offline
- Explainable
01 Moonlit traces turn an invisible signal into something you can compare.
Your local experiment
The field kit
Make each sound a few times. The model only compares the examples you give it.
Name three sounds
Choose actions or objects—not people or traits.
Listen & collect
Select a label, then record a 1–4 second example.
The live waveform will appear here while the microphone is listening.
Visible evidence
Inspect a sound
Record or select a specimen to see the evidence the baseline compares.
No sound under the lens yet
Your first recording will reveal a waveform, frequency trail, and MFCC-like shape.
Record a first soundSelected specimen
Transparent baseline
Follow the classifier’s guess
It finds the three stored examples with the most similar spectral fingerprints. Nearest votes win.
Ready for a mystery sound?
Collect one example for each label, select Test sound, then record something new.
The baseline’s guess
—
Nearest examples
Shorter distance means a more similar stored feature shape. It is not probability.
Local collection
Your specimens
0 recordings on this device
Take your work with you
JSON includes recordings and can be imported later. CSV contains the visible features for a spreadsheet.
No black box
What happens
under the surface
The playground deliberately uses a small, fallible method. The point is to inspect where it works—and catch where it doesn’t.
- 01
Listen
Your browser captures at most four seconds after you explicitly allow the microphone.
- 02
Summarize
Web Audio turns the clip into loudness, frequency bands, and an MFCC-like cosine summary.
- 03
Compare
A nearest-neighbor baseline measures Euclidean distance between normalized spectral fingerprints.
- 04
Question
You inspect every neighbor and mark wrong guesses. No hidden training and no cloud model.