Online Decibel Meter – Measure Sound Level in Real Time
Measure ambient noise, microphone volume, and background sound instantly using your browser.
No app required. 100% free.
Your browser will request microphone access on first use
Decibel values are approximate and may vary by device
Sound Level Safety Reference
Real-Time Sound Level Monitoring
Current Sound Level
Live decibel (dB) measurement
Average Noise Level
Continuous average calculation
Peak Level
Maximum detected sound
Noise Safety Indicator
Visual warning when sound exceeds safe limits
What Is a Decibel Meter?
A decibel meter, also known as a sound level meter, is a tool used to measure the intensity of sound in decibels (dB). It is commonly used to test environmental noise, microphone volume, workplace noise safety, and background sound levels.
With an online decibel meter, you can measure sound instantly using your computer or phone microphone—without any additional hardware.
How Accurate Is This Online Decibel Meter?
Our online decibel meter uses your device's microphone and the latest Web Audio API to analyze sound levels in real time.
Accuracy depends on:
- Microphone quality
- Distance from the sound source
- Background interference
For daily use, home testing, streaming setup, meetings, and general noise monitoring, this tool provides reliable and practical accuracy.
When Do You Need a Sound Level Meter?
You can use a decibel meter for many real-life situations:
Microphone noise test
Before meetings or live streaming
Home noise detection
Neighbors, appliances, outdoor noise
Sleep noise monitoring
Track ambient sound levels
Headphone volume safety check
Protect your hearing
Key Features of Our Online Decibel Meter
- Real-time decibel (dB) measurement
- Instant sound level visualization
- Works on all modern browsers
- No downloads or installations
- Mobile-friendly
- Free forever
Frequently Asked Questions
Is an online decibel meter accurate?
It is accurate enough for personal use, meetings, streaming setup, and general noise testing.
Is this decibel meter free?
Yes, it is completely free to use with no hidden restrictions.
Does this tool store my audio?
No. All sound processing is done locally in your browser.
Can I use this on my phone?
Yes. It works on both desktop and mobile devices.
About DecibelMeter
DecibelMeter provides free online tools to help you measure sound levels, test microphone noise, and monitor environmental noise accurately and safely.