Mic listens to the road. Masker rises when it gets loud, fades when it's quiet.
System
IdlePick a masker, tap Start, grant mic access.
Feedback tip: if the same phone plays the masker and listens, the mic hears itself.
Peak-detection mode (default) handles continuous sounds. Best result: phone where noise is loudest,
separate speaker across the room.
Live
Mic levelMasker gainThreshold
Ambient noise—
—
Masker0%
—
Masker Sound
Water
Wildlife
Reference noise
Your own loop
No file loaded
Levels
Max volumeLoudest the masker ever gets (when road peaks)
60%
Idle volumeWhat plays when it's quiet (0 = silent)
0%
Response
Detection modeHow the mic decides something's loud
Peak (spikes above baseline)
Instant (all sound)
Low-freq only
ThresholdHow loud it must get before the masker rises
6 dB
Sensitivity rangedB above threshold to reach max
15 dB
Attack timeHow fast the masker rises
250 ms
Release timeHow slowly it fades
4.0 s
Capture 5–10 min of road noise, then view its frequency profile.
Record
00:00
Aim for 5–10 minutes
Live spectrum (20 Hz → 16 kHz, log scale)
Your Recording
Average frequency content
Backups and version info.
Settings backup (JSON)
Your masker settings — sound choice, thresholds, attack/release, volumes, mode. Export to keep
between devices or page reloads.
Full site backup
Save a copy of the whole app as a standalone HTML file. Works offline when opened directly
(though mic access needs a browser that allows it on local files).