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Decibel Sound Meter: dB SPL app icon

Decibel Sound Meter: dB SPL

Sound level meter(or SPL) app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. you'll experience tidy graphic design with high frame by this smart sound meter app. Decibel meters also are referred to as sound level meters (decibel meters), noise detection, sound meters, noise detectors, and noise detectors. Decibel meter may be a noise detection software that uses mobile microphone to live the ambient noise decibel (dB). The current decibel size and curve are displayed during the method . With the decibel meter, you'll measure the present ring The background level of the environment is straightforward and straightforward to use. Functions:

Get it on the App Store
Version 1.7.0 Updated 2026-09-17 Requires iOS 17.0 Size 9 MB Price Free

What it does

Questions people ask about Decibel Sound Meter

How accurate is a phone as a sound level meter?
Close enough to compare one room with another and to watch a level rise and fall, not close enough for a legal or workplace measurement. A phone microphone is built for voice: it is tuned for the middle of the range and it squeezes very loud sound, so the loudest readings come out lower than they really are.
Can I make it more accurate?
The app applies an automatic correction on its own. If you can stand next to a proper meter in a steady noise, note the difference — that gap is your phone's offset, and it stays roughly the same.
Why does the number jump around so much?
Because sound does. That is why the app shows minimum, average and maximum alongside the current value, and draws the curve: a single instant tells you far less than thirty seconds of it.
What counts as loud?
The built-in scale puts a whisper near 30 dB, a quiet library near 50, conversation near 60, a busy street near 80, a factory near 90 and a train near 100. Above that you are in the range where hearing protection stops being optional.
Does it need internet or record anything?
It needs the microphone to measure, and nothing else. It works offline and does not send anything anywhere.
Can I use it to prove my neighbour is too loud?
Treat it as a note to yourself, not as evidence. A complaint that has to hold up needs a calibrated meter and, usually, someone qualified to hold it — but knowing roughly what you are dealing with is a reasonable first step.

What's new in 1.7.0

• The readings were labelled dBA but the app was measuring without any weighting at all. A-weighting to IEC 61672 is now actually applied, and so is proper Fast time weighting • The session average is now a real LAeq instead of an arithmetic mean of decibels • Daily dose used an 85 dBA threshold instead of the 80 dBA the NIOSH standard asks for: a full shift at 84 dBA showed 0% when it is 79% • A phone call used to stop the meter for good while the screen still said it was measuring • Automatic calibration could hang forever, and a legitimate 0.0 dB offset was thrown away • Two features on the purchase screen were not real: one is free for everyone and the other does not exist • The whole professional mode was in English in every language • The app now says plainly that a phone microphone is not a certified sound level meter

Privacy and support

Decibel Sound Meter works offline and does not require an account. Read the privacy policy and the terms for this app, or write to us if something is wrong.