Audio Test

Fabris Luca

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About this app

The Test is done at many different frequency so to produce the graph of the audio path response.
The purpose of the Test is to compare the audio path gain of a system composed of an amplifier and loudspeaker but you can test also only a loudspeaker or earphone. The phone generate a list of tones(frequencies), the signal is acquired from the microphone and the relative power is calculated for each frequency. Please note that 0dB is an undetermined value so the measures are relative and not absolute values.

A teacher used this App to do an experiment in his class, he was able to find the speed of sound using a phone and a cardboard tube. Determining the loudest frequencies, then these are the resonance frequencies and will lead to the speed of sound because the length of the tube is related to the wavelength of the resonant frequencies.

The tests are in the internal directory of the App to improve compatibility with Android 10 (Android/data/com.fbrlcu.audiotest)

Ratings and reviews

I tried this app again, after making corrections that correspond to the results and retesting, the results did not match my corrections. there needs to be a pink noise test within this app so corrections can be done in real time and also to show that the app can register your corrections correctly. I doubt the tones are all played at the exact same level. a "2" because it does run, just not good for what it's made to do.

This app is a breath of fresh air in the audio testing category. While many apps in this space are overly complex, this one nails it with its straightforward approach. It does exactly what I need without all the unnecessary bells and whistles. Highly recommend!

I think the accuracy performance depend with your internal mic quality,i have tested it 20Hz-20KHz,and its not accurate lol But atleast it works,3 stars from me:/

What’s new

minor improvement