NoiSee

NoiSee

Professional sound level meter

242 ratings
15 reviews
$0.99
In-App Purchases

Details

  • Released
  • Updated
  • August 9, 2012
  • July 18, 2026

Features

NoiSee screenshot #1 for iPhone
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NoiSee screenshot #9 for iPhone
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About

This app functions as a professional-grade sound level meter for iOS devices. It offers advanced features for occupational health measurements, including noise dose and projected dose calculations. The app utilizes the device's internal microphone and provides accurate readings tested against professional standards.

Professional-grade sound level meter
Occupational health compliant parameters
Noise DOSE and Elapsed time
Frequency and time weighting options
Spectrum analysis
Calibration features
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What's New in NoiSee

3.1.0

July 18, 2026

- Up to 3.5x lower CPU usage - Improved oscilloscope - Configurable spectrum display modes - Improved fullscreen mode

More
1

In-App Purchases

$1.99

Logging

Log measurements and export as CSV.

User reviews

Calibrate

As title suggests, so long as you can calibrate the mic you’re using against a Class 1 SLM, in my opinion this seems to be the best “SLM App” available and as such, a good indicator of time weighted (LAeq) & 3rd Octave numbers = 👏🏻💯🙏🏻

Gets the Job Done

For what I was needing this sound meter app got the job done. This app renders a lot of data that I did not quite understand but that is ok. As another reviewer stated, this app will fail upon startup at times but that is easily overcome. 5 stars!

Good, could be better

I’m no expert. I like the graphics, I plan to use it in restaurants. I can report the cicada background here is 50+ db
I’d appreciate explanations of the terminology or a link for it.
If you need to reset just turn it off and on, which seems unobjectionable for such a cheap app.

Useful with scope for improvement

Would be nice to have integration with Shortcuts and ability to save data to Apple health. I can then automate sampling based on events and time.

Exactly what I wanted

It’s doing the simple things I wanted and I am learning more and more about sound environments and the more sophisticated details I should be examining.

Developer apps

FAQ

What does NoiSee do?

NoiSee is a professional-grade sound level meter application for iPhone and iPod touch. It measures sound levels and provides tools for occupational health measurements, including noise dose and projected dose calculations. The app is designed to meet or exceed class 2 requirements of relevant ANSI and IEC standards.

What are the key features of NoiSee?

Key features include a Sound Level Meter mode with history view, statistics, and time weightings (Fast and Slow), measuring parameters like Leq, LCpeak, and SPL. It also offers a Spectrum view for frequency and time-weighted sound levels. The Noise at Work mode provides occupational health compliant parameters like Noise DOSE, Elapsed time, LEX 8h, and Projected DOSE.

Is NoiSee free to use?

The application is available for free download, but it operates on a freemium model. Users can start measuring immediately with the internal microphone, and additional features or advanced functionalities may be unlocked through in-app purchases.

What devices is NoiSee compatible with?

NoiSee has been developed to run on devices running iOS 10 or higher. The app has been tested on different iPhone models, taking into account microphone differences, to ensure accurate readings. It can utilize the internal microphone or compatible external microphones.

How accurate are the sound level readings?

The app's readings are designed to be highly accurate, leveraging the device's internal microphone and accounting for generational differences. Initial calibration is performed using professional-grade equipment in an anechoic chamber. The app makes full use of the iPhone's dynamic range (approximately 45 dB to 100 dB) and frequency response range (100 Hz to 8 kHz).