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NIOSH Sound Level Meter

NIOSH Sound Level Meter

by EA LAB

17K ratings
200 reviews
🔧 Utilities
💪 Health & Fitness
Free

Details

Released
January 13, 2017
Updated
October 21, 2026

Features

Developer

EA LAB
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About

This free app measures sound levels and noise exposure using your smartphone. Developed by acoustics experts, it provides professional-grade metrics and guidance on hearing protection and noise prevention.

✓Sound level measurement
✓Noise dosimetry
✓Hearing hazard information
✓Hearing protector guidelines
✓Data reporting and sharing
✓Microphone calibration
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What users say about NIOSH Sound Level Meter

Reviews of NIOSH Sound Level Meter are mostly positive: the Utilities app is rated 4.7/5 from 17K App Store ratings. What users like most: free and ad-free, simple and intuitive interface. Top complaints: occasional bugs and crashes, issues with external microphone support. Summarized from real user reviews.

Positive things

  • 🚀Free and ad-free
  • 👍Simple and intuitive interface
  • ⚖️Accurate and reliable measurements
  • 💡Useful for monitoring noise levels in various environments
  • 🔍Provides detailed noise data and exposure information

Negative things

  • 🐛Occasional bugs and crashes
  • 🔌Issues with external microphone support
  • 🔋Can drain battery when running for extended periods
  • 📱Limited iPad optimization
See all reviews

What's New in NIOSH Sound Level Meter

1.6.0

October 21, 2026

- Measuring in the background and with the screen locked now works correctly - Projected dose is now calculated correctly - Improved accuracy on more iPhone and iPad models - Bug fixes and performance improvements

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User reviews

Most RecentHighest RatedLowest Rated

Fantastic app!

I was trying to find a good app and all of them were just scams. Luckily I checked this app and I could finally find out how loud my show way!
EEpicrorz!

Stop asking for reviews before I’ve even used it

STOP ASKING FOR REVIEWS AS I AM TRYING TO USE IT
Ppurplelips666

2026年時点で優秀かつユーザビリティが高いアプリ

2026年となると過去のレビューはあてにならず良い騒音計測アプリを探すのに苦労します。ですがシンプルで分かりやすいUIであるため、こちらは日本語はサポートしていませんが、英語表記でも困ることはなく期待通りの利用ができます。
デベロッパーに感謝します。
ぽぽるぽるどーん

Response from developer

日本語対応に関する温かいお言葉とフィードバックをいただき、ありがとうございます。

Stop asking for reviews before I’ve even used it

Stop asking for reviews before I’ve even used it
Ppurplelips666

No tracking!

Finally a decibel meter app with no telemetry. And it seems to be done professionally too. Haven’t gone for calibration or tried it with an external microphone yet, but I’m hopeful that that experience will follow suit. Some small UI fixes needed where text boxes float inside of their containers on some of the explainer pages, but other than that super solid.
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Rredarremer

Response from developer

Thank you for the review and feedback. Please forward the specific issues you encountered with the text boxes to NIOSHNoiseResearch@cdc.gov so we can address them with our next update. Thanks again.

See 195 more reviews

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User experience

🐞

Reported Bugs

3 issues

Inconsistent or inaccurate readings in some cases

Bug

Inability to properly connect and use external microphones

Bug

Freezing or crashing when minimizing the app

Bug
✨

Requested Features

4 requests

Ability to save and export measurement sessions

Feature

Option to run the app in the background while the screen is locked

Feature

Integration with Apple Health for long-term noise exposure tracking

Feature

Frequency-specific noise measurements (e.g., A-weighted, C-weighted)

Feature

FAQ

What does the NIOSH Sound Level Meter app do?

This app functions as a professional sound level meter and noise dosimeter, allowing you to measure ambient noise levels and assess noise exposure. It provides key metrics like LAeq, TWA, Max, and Peak levels, as well as noise dose calculations according to NIOSH and OSHA standards.

Is the NIOSH Sound Level Meter app free to use?

Yes, the app is completely free with no advertisements, limited features, or in-app purchases. It offers full functionality without any cost to the user.

How accurate is the NIOSH Sound Level Meter app?

The app has been tested and validated for accuracy, with a tolerance of ± 2 dBA, according to standards in a reverberant chamber at the NIOSH acoustics lab. When used with an external microphone, it meets Type 2 requirements of the IEC 61672:3 SLM standard.

What kind of information does the app provide about hearing safety?

The app includes up-to-date informational screens detailing what noises are considered hazardous, how to conduct noise measurements, how to select appropriate hearing protectors, and guidelines for preventing hearing loss.

Can I use this app on different devices?

While the description doesn't explicitly state compatibility with all devices, it is designed for smartphones and supports Apple's Health (Hearing) app, suggesting compatibility with iOS devices. More detailed compatibility information can be found on the NIOSH SLM website.