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NIOSH Sound Level Meter

NIOSH Sound Level Meter

by EA LAB

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

Details

  • Released
  • Updated
  • January 13, 2017
  • May 12, 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
Show original description

What users say

Summarized from real user reviews of NIOSH Sound Level Meter. Based on 17K reviews and a 4.7/5 average, it highlights the 5 positives and 4 negatives reviewers mention most about this Utilities app.

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

1.5.0

May 12, 2026

Support for arbitrary sample rates, bug fixes

User reviews

Most RecentHighest RatedLowest Rated

Stop asking for reviews before I’ve even used it

Stop asking for reviews before I’ve even used it
purplelips666purplelips666

Emailed reading

I emailed myself a reading earlier today and it was never sent
Jenni frm the lakeJenni frm the lake

Great!

Free and accurate sound level meter. It is very useful. Thank you!
ㄱㄱ임ㄱㄱ임

So good I’m surprised it’s free!

It’s just nice that there’s an app out there that does what you want without constantly bombarding you with ads and limiting features

Need to check the noise level? Use this app
Jimothy-HJimothy-H

yes

yes
dlwlrmaleedlwlrmalee
See 188 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.