Sound Analyzer App

Dominique Rodrigues

About this app

Sound Analyzer App lets you use your smartphone as a Sound Level Meter (SLM) and a Real time Audio Analyzer (RTA). Environmental noise, measured in decibel (dB) can be monitored in real time. The microphone sensitivity is adjustable by means of the calibration menu.

App with no ads, banner or popups.

Features as sound meter (decibel meter):
A, C and Z (flat) frequency weightings,
Fast and Slow time weightings,
Equivalent A-weighted continuous sound level (LAeq),
A-weighted sound exposure level (LAE or SEL),
A-weighted sound exposure level for a nominal 8-hour working day (noise dosimeter: LEP,d or LEX,8h).

Features as 1/n octave spectrum analyzer:
1/3 octave band spectra: Centre frequencies 25 Hz to 16 kHz,
1/1 octave band spectra: Centre frequencies 31.5 Hz to 8 kHz,
A, C and Z (flat) frequency weightings,
Fast, Slow and Impulse time weightings,
Equivalent continuous sound level (Leq).

If you are not familiar with Sound Pressure Level (SPL) indicators, use the default selection: LAF and LAeq indicators respectively for instantaneous and averaged noise measurements.

Warning: This App does not claim to be an alternative to an approved Sound Level Meter. The accuracy of the measurements depends closely on the specifications of the microphone/amplifier which are not designed in a smartphone for Sound Pressure Level (SPL) measurements. This App is for indication only or for educational purpose. Use an approved Sound Level Meter where it is required.

If you like the app, please rate it.

Ratings and reviews

I work in a hotel and needed to measure room noise level for the AC. I've tried several noise testing apps, each showed different values. Somehow i could find an industrial noise testing equipment and i could compare the values. This app showed an amazing accuracy and performance as well. So, this is a proving comment with calibrated equipment.

Extremely useful app, this is easily accurate enough for my purposes. My only criticism is that, when zooming in on the graph, the lowest reading is always shown. I would like the graph to stay where I need it. However when paused the readout stays put and can be zoomed freely. Would it be possible for the graph not to reset after hitting play? Great work and many thanks.

Fatally flawed as it doesn't allow you to select a microphone source. By default, Android seems to send a processed signal that compresses loud noises (or boosts quiet ones) -- you can see this in action by playing a loud test tone after silencr, as the reported level will quickly drop as the processing recalibrates. Every modern Android device I've owned, however, also has the option to select an unprocessed audio feed, so long as the app asks. A dark mode would be most welcome, as well.

What's new

Bug fixes