Audio Test
Test audio path gain by generating tones and at the same time recording it
Fabris Luca · com.fbrlcu.audiotest
UpdatedApr 25, 2024
PublishedMar 20, 2021
Packagecom.fbrlcu.audiotest
MD54e779399446e2c4516c68a29ade3f666
SHA1 (signer)1F:C9:40:BE:D5:EE:D2:95:60:37:A8:0F:93:B3:92:06:41:AE:4B:C1
Signed byCN=Fabris Luca, L=Ravenna, ST=Italy, C=39
Malware scanTRUSTED
Contact[email protected]
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What's new
minor improvement
Description
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)
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)
Required features
- Faketouch android.hardware.faketouch
- Microphone android.hardware.microphone
- Screen Portrait android.hardware.screen.portrait
Permissions (11)
Audio Test requests the following Android permissions:
- Access Adservices Ad Id android.permission.ACCESS_ADSERVICES_AD_ID
- Access Adservices Attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
- Access Adservices Topics android.permission.ACCESS_ADSERVICES_TOPICS
- Access Network State android.permission.ACCESS_NETWORK_STATE
- Foreground Service android.permission.FOREGROUND_SERVICE
- Internet android.permission.INTERNET
- Modify Audio Settings android.permission.MODIFY_AUDIO_SETTINGS
- Record Audio android.permission.RECORD_AUDIO
- Wake Lock android.permission.WAKE_LOCK
- Com Fbrlcu Audiotest Dynamic Receiver Not Exported Permission com.fbrlcu.audiotest.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Gms Permission Ad Id com.google.android.gms.permission.AD_ID
