Session
Idle — start a session to begin monitoring.
Measurements follow IEC 61672 / ISO 1996 methods as design targets. This browser instrument is non-certified and unsuitable as sole evidence for accredited legal measurement without calibrated Class hardware and qualified procedure. Processing stays on-device.
Live levels
1/3-octave spectrum
LAF history
ML anomaly
Events
Chain of custody
Every sealed record is dual-hashed with SHA-256 and Blake3. Export includes JSON evidence package + JSONL chain.