Sound level
Not listening
Not listening
Paused. Your phone stopped the microphone, so nothing is being measured.
Put your phone down facing the street, screen up. Numbers are approximate: phone microphones are not calibrated instruments.
Tonight so far
Demo · not saved- Crackers heard
- 0
- Ladis
- 0
- Rockets & anaar
- 0
- Loudest
- --
- Average
- --
- Above 85 dB
- 0 min
- Outside 8–10 pm
- 0
- Noise dose ?
- 0%
Last 90 seconds
- level
- bang
Spectrogram of the last few seconds. A bang is a bright vertical streak; a rocket's whistle is a rising line.
Your night, 10 minutes at a time
- 8–10 pm
Each bar is the number of crackers in 10 minutes, coloured by the loudest moment in it.
Every burst
Nothing yet. Bangs, ladis and rockets appear here as they happen.
What the numbers mean
Firecrackers in India must not be louder than 125 dB(AI), measured 4 metres from where they burst (Environment (Protection) Rules, 1986). This meter reads dB(A) wherever your phone is, so the limit on the gauge is a reference point, not a verdict on any one cracker. In 2018 the Supreme Court limited Diwali crackers to 8 to 10 pm; states set their own rules on top of that.
Calibrate
Phone microphones differ by several decibels. If you have a sound level meter, hold both side by side in steady noise and slide until the numbers match. Do it before you start: time above 85 dB is counted with the calibration in force at the moment.