About Decimeter.com
Making sound measurement accessible to everyone
Our Mission
Decimeter.com was created to help people understand the sound levels in their environment. Whether you're working from home, attending a concert, or concerned about noise in your neighborhood, we believe everyone should have access to tools that help protect their hearing. Start measuring with our free online sound level meter.
How It Works
Decimeter uses your device's microphone and the Web Audio API to analyze incoming sound in real-time. The audio data is processed entirely within your browser to calculate an approximate sound pressure level in decibels (dB). We also offer a frequency analyzer to see the spectrum breakdown and a noise exposure calculator to track your daily dose.
Privacy First
Your audio is never recorded, stored, or transmitted. All processing happens locally on your device. We don't have access to your microphone data. Read our full privacy policy.
Important Disclaimer
Decimeter.com provides approximate sound level measurements for educational and general awareness purposes only. Our tool is:
- • Not a calibrated professional instrument
- • Not suitable for official compliance testing
- • Not a substitute for professional noise assessments
- • Dependent on your device's microphone quality
When to Consult Professionals
For official noise compliance testing, workplace safety assessments, or any situation requiring legally defensible measurements, please consult a professional acoustician with calibrated Class 1 or Class 2 sound level meters that meet IEC 61672 standards.
Intended Use
Decimeter is designed for:
- General awareness of environmental noise levels
- Educational purposes and learning about sound
- Quick, informal checks of ambient sound
- Comparing relative noise levels between environments
- Raising awareness about hearing health
Our Tools
Beyond the sound level meter, we offer additional tools to help you understand and protect your hearing:
- Frequency Analyzer – Visualize which frequencies are present in any sound
- Noise Exposure Calculator – Track your cumulative daily noise dose based on NIOSH guidelines
Contact Us
Have questions, suggestions, or feedback? We'd love to hear from you. Visit our contact page to get in touch.