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NIOSH Sound Level Meter

NIOSH Sound Level Meter

by EA LAB d.o.o.

16K ratings
169 reviews
🔧 Utilities
💪 Health & Fitness
Free

Details

  • Released
  • Updated
  • January 13, 2017
  • May 12, 2026

Features

Developer

EA LAB d.o.o.
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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

Summarized from real user reviews of NIOSH Sound Level Meter. Based on 16K 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
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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

Helpful

I started using this at work because I needed a way to document the noise level around my desk. The people making decisions about the workspace aren’t the ones sitting there all day, so having actual decibel readings made it easier to show that the constant noise wasn’t just my perception. I was surprised that I had to prove my desk sits around 65 dB for a basic desk job, but I’m glad I had a free tool available to measure it.

I’ve also used it at home to check noise levels around my dogs so I can be more aware of what they’re being exposed to.

I also appreciated that the app is completely free. There were no ads interrupting me and no in-app purchases getting in the way, which is becoming less common.
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Cat ElitaCat Elita

Awesome App

App is working great. The developer(s) were awesome to deal with. Thanks
rap144rap144

Great App

App is working great Now! The developer(s) were very helpful.
rap144rap144

Thank you for creating this app

It helps me with my science project
You learn a lot from thisYou learn a lot from this

Microphone unavailable fixed in 1.5.0(52)

I have used NIOSH for several years but it recently fails reporting my internal microphone operates at 16000 Hz and 48 kHz is required. My Starkey hearing aids connected via Bluetooth is the culprit. If I turn off Bluetooth, NIOSH works but Starkey Thrive app can’t connect. Thank you NIOSH for this accommodation.
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HlCunninghamHlCunningham
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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.