Sound Meter: Measure Decibels (dB) Online
Use your phone or laptop mic to measure how loud it is, and compare your speaker volume before and after cleaning.
How to use it
Three quick steps.
Start the meter
Allow microphone access. Readings update five times a second.
Save a βBeforeβ reading
Play a song or test tone at full volume, hold the phone the same distance away, and press Save as Before.
Clean, then compare
Run the speaker cleaner, play the same sound again and press Compare After to see the change in dB.
Check if cleaning really worked
A muffled speaker is often several decibels quieter than normal. Measuring before and after cleaning shows you the difference with a number instead of guessing. Use a second device as the meter, or a laptop, so the speaker you are testing plays the sound. A gain of 3 dB or more is a clear, audible improvement.
How loud is that?
| Level | Example | Note |
|---|---|---|
| 30 dB | Whisper, quiet bedroom | Very quiet |
| 60 dB | Normal conversation | Comfortable |
| 80 dB | City traffic, loud TV | Long exposure can tire your ears |
| 85 dB+ | Busy club, power tools | Limit time; hearing risk grows |
| 100 dB+ | Concert, headphones at max | Protect your ears |
How accurate is it?
Phone and laptop mics are tuned for voices, not measurement, so treat readings as an estimate, usually within about 5 dB. Use the Calibrate slider if you can compare against a real sound level meter. Comparisons on the same device (before vs after) are much more reliable than single readings.
Questions people ask
Is my audio recorded or uploaded?
No. Sound is measured live in your browser and never leaves your device.
Why does it show different numbers than another app?
Every mic is different. Use calibration, and compare readings made on the same device.
Can I test my speaker with my own phone?
You can, but results are best when one device plays the sound and another measures it.
What is a safe decibel level?
Below about 70 dB is safe for long periods. Above 85 dB, limit your time.
Does the sound meter work on iPhone?
Yes, in Safari and Chrome after you allow microphone access.
Why does the meter show a reading in a quiet room?
Every mic picks up some background hum and electrical noise. Readings around 25 to 35 dB in a quiet room are normal.
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