Latest update
Compatibility to the permission system from Android 6
Automatic switching of language English / German
Minor improved graphics and program control
acoustic frequencies APK Description
The APP captures the acoustic pressure by the internal microphone in function of time. The sampling frequency is always 8000 Hz.
Buttons arranged on the top:
Low: Low frequency resolution, for fast response
frequency resolution approx. 15.6 Hz
Med: Medium frequency resolution (only available in PRO-version)
frequency resolution approx. 3.9 Hz
High: High frequency resolution (only available in PRO-version)
frequency resolution approx. 1.0 Hz
"Ultra high Frequency Resolution" --> see below
Stop: Stops the measurement
Exit: Terminates the APP
Description of the graphics (from top to bottom):
1st graphic with sound level trend:
Sound level trend of the last 12 seconds, scaling from 0 dB to 90 dB.
By wiping across the 1st graphic (wiping always from bottom left to top right over the relevant graphic) the numerical current value is displayed.
2nd graphic with sound pressure in function of time
3rd graphic for tone identification:
If a clear tone within the frequency spectrum can be determined, the tone will be displayed with a red bar.
4th graphic with numerical peak-frequency and frequency spectrum:
The numerical frequencies of the three highest peaks will be displayed. For better reading you can stop the measurement with the "Stop"-button.
5th graphic third octave band analysis:
For acoustic assessments the third octave spectrum is used. The relevant frequency range from 100 Hz (limited due to the frequency response of the internal microphone) to 3150 Hz (limited due to the sampling frequency) is displayed.
Only available in PRO-version:
The frequency response of the internal microphone was calibrated in a diffuse sound field to a reference device. This calibration has been performed on a Samsung Galaxy S2. The displayed third octave dB-values include this correction and the A-weighting.
Other implemented wiping gestures:
Ultra high frequency resolution (only available in PRO-version):
By wiping across the 4th graphic (wiping always from bottom left to top right over the relevant graphic) an ultra-high frequency resolution will be activated, frequency resolution approx. 0.5 Hz.
Higher integration time (only available in PRO-version):
By wiping across the 5th graphic (wiping always from bottom left to top right over the relevant graphic) the averaging time of the displayed third octave values is increased by a factor of 5.
Show internal diagnostic data:
By wiping across the complete display (wiping always from bottom left to top right) internal data is displayed in the lower part of the display.
For more details:
http://www.hs-koblenz.de/profile/kroeber/
Keywords: acoustic, frequency, tone detection, frequency analysis, third octave analysis, dBA, FFT
How to install acoustic frequencies APK for Android
Download acoustic frequencies APK file (com.kroeber.acoustic_frequencies_3_1357525.apk) from APKPure.live, then follow these steps:
Update Phone Settings
- Go to your phone Settings page
- Tap Security or Applications (varies with device)
- Check the Unknown Sources box
- Confirm with OK
Go to Downloads
- Open Downloads on your device by going to My Files or Files
- Tap the APK file you downloaded (com.kroeber.acoustic_frequencies_3_1357525.apk)
- Tap Install when prompted, the APK file you downloaded will be installed on your device.
How to install acoustic frequencies APK on Windows PC 7/8/10/11 or MAC?
Download acoustic frequencies APK file (com.kroeber.acoustic_frequencies_3_1357525.apk) from APKPure.live to your PC (ex: C://Users/xxx/Downloads/(com.kroeber.acoustic_frequencies_3_1357525.apk), then follow these steps appear on screen.
Using Emulator:
- Download And Install one Emulator Softwares (Ex: Bluestacks, GenyMotion, NoxPlayer)
- Simple install APK on PC by drag and drop file com.kroeber.acoustic_frequencies_3_1357525.apk on Emulator screen
acoustic frequencies APK Pros & Cons
Pros
- This app is safe, it's not require high risk permissions
- Compatible with 32 bit device (most Emulator using 32bit arch CPU)
- Compatible with 64-bit device (some android device and current Bluestacks)
Cons
Everything is good.
