NIOSH Sound Level Meter

So much more functionality than you would expect. From making notes, linking to health app, and even exporting your recordings as a PDF, it really offers so much. Didn’t need to spend money on a decibel meter unless you need pro level readings.

The app is showing extremely inaccurate levels on my new iPad Pro M4 with (ios 18). The readings are too high by about +25 dB compared to my iPhone 14 and old iPad (ios 17)! I have tried uninstalling/reinstalling, etc., but no improvement. This magnitude of error is beyond the manual calibration range (20dB). I have heard that there may be a bug in the app since the release of ios 18. I hope this is fixed, as the app has been working perfectly up til now, on multiple devices.

Doesn’t pick up low decibel sounds very well

This app worked great for a few months. It wasn’t very accurate compared to my calibrated OSHA meter, but within 10%. Then it just started giving absurd readings. Then no readings at all.

this app helps ❍☯︎• but where the maps integration for finding quiet places?

Just locks up doesn't work on my iPhone

Since I updated to iOS 18, the app seems quite inaccurate, showing levels of 106 dB during music that isn’t as loud as a typical vacuum cleaner. I have another similar app that is behaving similarly under iOS 18.

This is the definitive app for quick and accurate measurements from the connivence of your phone! The ability to quickly take a measurement to ensure safe operating levels when working in the field of live audio has been the most helpful tool in my arsenal. If you are questioning the accuracy of this app, don’t fear!! It’s accurate, like +/- 2db accurate consistently! The CDC knocked this one out of the park and I am forever grateful for this app.

Love this app, amazing that it is free! Super useful even with the built in microphones on any device, I’m using it on an iPhone 12 Pro Max in 2024. I started by wondering how loud it is outdoors in my backyard, something was bothering me. Turns out it is a neighbor’s AC unit and I was able to walk around and measure the dB level to map where it got louder. But even when that unit was off it was amazing how loud the insects are! Suburban backyard with no landscapers nearby (for the moment, that never lasts long) my sound floor is around 65 dB! Turns out the cicadas are going crazy and they make sounds over 100 dB!!! Things I would like to see added to the app, free or perhaps in-app purchase: dB by Octave Bands and the ability to filter live measurement by bands. Also the Noise info module could have several more entries: 1) Common sound floor levels of different environments 2) Common sound levels of different noises 3) Description of Octave bands (Premium) 4) Repeat 1 & 2 by octave bands (Premium)

The app is easy to start, but saving the reading data is not easy to do and you can loose all the data. Could be fixed by making the record button change to a save button when recording data.