Noise Notebook
Measurements stay on this device{{active ? 'Listening' : 'Noise session'}}
{{stateLabel}}No audio is recorded or uploaded. These are relative microphone readings, not calibrated dB SPL or dBA. Compare sessions using the same device, microphone, and placement.
Threshold & measurement details
The threshold is your own comparison marker, not a health or nuisance limit. Each point summarizes sampled microphone signal over about one second. Browser microphone processing and hardware affect the result. Hidden pages, screen locks, device sleep, and microphone interruptions end the session; this is not an unattended overnight monitor.
Session data and fatigue notes are saved in this browser only. Clearing site data removes them. Export a session to keep a backup. Basic page analytics run separately; measurements and notes are not sent to analytics.
{{selected.place||'Untitled place'}}
{{date(selected.startedAt)}} · {{selected.status}} · {{selected.reason}}
Measurements will appear here after you start.
Elapsed minutes → · dBFS · dashed line marks your threshold
{{noteStatus || ('Fatigue before: '+(selected.before||'not noted')+' / 5. Notes can help you notice patterns; they do not establish a cause.')}}
Measurements · {{selected.samples.length}} readings
| Elapsed | Level (dBFS) | Above threshold |
|---|---|---|
| {{(s.t/1000).toFixed(0)}} s | {{s.db.toFixed(1)}} | {{s.db>selected.threshold?'Yes':'—'}} |
Saved sessions
This browser · {{sessions.length}}Your first session will appear here. Try the same spot at different times of day.
| Place / started | Status | Readings | Fatigue |
|---|---|---|---|
| {{s.place||'Untitled place'}}{{date(s.startedAt)}} | {{s.status}} | {{s.samples.length}} | {{s.before||'—'}} → {{s.after||'—'}} |