Get started in seconds
Learn to measure sound levels with your device's microphone. Simple steps for accurate noise measurements. Complete guide to using our free online decibel meter effectively and safely.
1
Allow Microphone Access
When you click "Start Measurement", your browser will ask for microphone permission. Click "Allow" so the tool can measure sound levels.
2
Position Your Device
For accurate measurements:
- •Hold your device at arm's length from the sound source
- •Point the microphone toward the sound
- •Don't cover the microphone with your hand
- •Keep the device steady during measurement
3
Start Measuring
Click "Start Measurement". You'll see:
- •Real-time decibel reading - The current sound level in dB
- •Color indicator - Green (safe), Yellow (moderate), Orange (loud), Red (dangerous)
- •Waveform - Visual representation of sound waves
- •Statistics - Max, Min, and Average values
- •History chart - Sound level trends over time
4
Calibrate (Optional)
For more accurate readings:
- 1.Use a reference meter to measure a known sound
- 2.Click "Calibrate" while measuring the same sound
- 3.Enter the reference value from your physical meter
- 4.Click "Calibrate" to save the offset
5
Export Data
Click "Export" to download your measurement history as a CSV file. Useful for tracking noise levels over time or sharing data.
Tips for Accurate Measurements
- ✓Different devices have different microphone sensitivities
- ✓Calibration improves accuracy significantly
- ✓Avoid wind noise when measuring outdoors
- ✓This tool provides estimates, not professional-grade measurements
- ✓For critical applications, use a certified sound level meter
Browser Compatibility
This tool works best on:
✓Chrome
✓Firefox
✓Safari
✓Edge