SoundDBMeter.com is a free educational website providing browser-based sound measurement tools and noise safety education — built to help anyone understand decibels, sound pressure levels, hearing risk, and occupational noise standards without specialist equipment or technical training.
The site was created and is maintained by Addito, an acoustic measurement researcher and noise safety educator with five years of experience studying sound pressure level measurement, browser-based audio processing, and occupational noise exposure standards.
Why This Site Exists
Most people encounter noise safety information in one of two ways: as an intimidating technical specification in a workplace compliance document, or as a vague “sounds loud, be careful” warning with no supporting context. Neither is genuinely useful.
SoundDBMeter.com was built to close that gap. The goal is not just measurement — it is understanding. A reading of 85 dB is only useful if you know what 85 dB means for hearing health, how long exposure at that level is considered safe under NIOSH and OSHA standards, how that level compares to everyday environments, and what the difference is between the two regulatory frameworks that govern occupational noise exposure.
This site connects every measurement and every number to the explanation that makes it actionable.
What the Site Provides
SoundDBMeter.com has two areas of tools and one area of educational content:
Microphone-based measurement tools — browser-based tools that capture real-time audio from your device microphone and produce sound level measurements:
- Online Decibel Meter — the flagship tool: real-time dB measurement with NIOSH and OSHA safety algorithms, session peak and average tracking, calibration offset control, and safe exposure time display. The selectable NIOSH/OSHA safety standard is a key feature — both frameworks are included because they use different exchange rates and arrive at materially different exposure limits for the same noise level
- Background Noise Test — measure the ambient noise level of any room or environment against recommended thresholds
- Frequency Analyzer — real-time audio spectrum analysis showing the distribution of sound energy across the audible frequency range
- Microphone Test — verify microphone function before using measurement tools
Audio and calculation tools — tools that work without requiring microphone input for sound measurement:
- Tone Generator — generate pure audio tones at any specified frequency for audio testing, calibration, and acoustic reference
- SPL Converter — convert between sound pressure level values (dB SPL) and pressure values in pascals using standard acoustic formulas. No microphone required
- Volume Level Comparator — compare two or more dB values and calculate the difference in sound intensity and pressure terms. No microphone required
- Noise Exposure Calculator — calculate permissible exposure duration based on any dB value and your chosen safety standard. No microphone required
Educational content — articles covering decibel science, sound pressure level, frequency weighting scales, hearing damage risk, occupational noise standards, real-world noise levels, and situational environment noise guidance. Noise safety content — including hearing damage thresholds and NIOSH/OSHA exposure limits — is grounded in publicly available institutional guidance. A consolidated list of cited sources is on the References page.
Who This Site Is For
SoundDBMeter.com is built for:
- Workers or employers wanting to understand occupational noise exposure without access to certified instruments
- Podcasters, content creators, and remote workers checking room noise levels before recording or calls
- Parents checking nursery or sleep environment noise levels against safe sleep recommendations
- Students studying acoustics, physics, or occupational health
- Teachers and educators looking for browser-based demonstration tools
- Anyone curious about how loud their environment is and what that means for their hearing
The tools are designed to be used without any prior acoustics knowledge. Every result comes with context explaining what the number means.
Accuracy and Transparency
Browser-based measurement cannot match certified professional instruments. The tools on this site produce estimates — not calibrated sound pressure level readings equivalent to Class 1 or Class 2 instruments. This limitation is stated clearly on every relevant page, including the dedicated Online Decibel Meter Accuracy page and the Accuracy and Limitations page.
The educational content — including all noise safety thresholds and regulatory exposure limits — is drawn from primary published sources. The site’s research and editorial standards are documented in the Editorial Policy. Cited references are listed on the References page.
Privacy Commitment
SoundDBMeter.com is designed with privacy as a default:
- Microphone audio is processed locally in your browser and never recorded, stored, or transmitted
- The site does not use Google Analytics, advertising networks, or behavioral tracking systems
- No account registration is required
Full details are in the Privacy Policy.
Get in Touch
Questions, corrections, and feedback are welcome. If you find an error in a safety figure, a technical claim that does not hold up, or a tool behaving unexpectedly, please use the Contact page. All messages are reviewed personally by Addito.
SoundDBMeter.com is an independent educational website. It is not affiliated with NIOSH, OSHA, WHO, CDC, or any regulatory body. Tools are provided for educational and general informational purposes only — not for regulatory compliance, legal proceedings, or certified occupational health assessment.
Founded and maintained by Addito — acoustic measurement researcher and noise safety educator.
Last updated: June 2026.