About Pulse Echo Sonar Meter
Uses the audio autput to generate sound pulses and then detects the echo on the microphone. The echo signal can be visulised in a map, Fourier transformed or just as the time-series waveform. Great for...
Uses the audio autput to generate sound pulses and then detects the echo on the microphone. The echo signal can be visulised in a map, Fourier transformed or just as the time-series waveform. Great for investigating/demonstrating acoustics principles.
RECORD_AUDIO Permission to use microphone to detect the echo. WRITE_EXTERNAL_STORAGE Permission is so that data can be saved.
Features/Specifications:
• Sampling frequency 44.1 kHz.
• Sampling duration 0.001 s to 5 s.
• Single / Continuous modes.
• Save Data in CSV files.
• Pulse Generation:
• Single/Train/Chirp.
• Square/Sine waveforms.
• Tukey/Hanning Envelopes.
• Pulse frequency 20 Hz to 22.05 kHz.
• Pulse duration up to 1 s.
• MAP – Visualise the echo. Colour or Black and White. Pixel value from RMS or absolute value. New line for each echo trace. Move device whilst pulse-echoing to generate a map.
• Fast Fourier Transform (FFT) of 8192 data points to determine frequency content between echo detect lines.
• Peak frequency detection
• FFT Averaging
For Indication Only. Use Ear Protection if required. Due to the limits of the typical microphone dB range on most devices, distant echo signal are likely to be too weak to detect clearly unless extra amplification or a strong echo is present.
For fun/educational/research use. This is not ultrasound and NOT suitable for any medical imaging. This app can create annoying loud sounds, so use ear protection if required.
Previous Versions
Here you can find the changelog of Pulse Echo Sonar Meter since it was posted on our website on 2016-11-05 23:14:56.
The latest version is and it was updated on 2024-04-19 18:02:03. See below the changes in each version.
Pulse Echo Sonar Meter version
Updated At: 2024-02-06
Changes: v1.06 Updated to use newer code methods to better target and run reliably on devices in 2024
Pulse Echo Sonar Meter version
Updated At: 2024-02-06
Changes: Version 1.04: Updated to use newer code libraries to target newer devices.
If you use the app to save data, the files will now be located in the documents folder, in a keuwlsoftpulse-echo-sonar sub directory.
Version 1.05 : Minor saving data fix.
Pulse Echo Sonar Meter version
Updated At: 2021-02-01
Changes: Fixed saving to work on Android 10. Other minor fixes.
Pulse Echo Sonar Meter version
Updated At: 2020-06-11
Changes: Various fixes, banner ad & privacy policy update. Reset All option added in the info screen. Save dialog updated - files now saved in keuwlsoft/pulse-echo-sonar/ directory.
Pulse Echo Sonar Meter version 1.01
Updated At: 2017-03-12
Changes: Removed unnecessary permissions, added link to privacy policy and made movable to SD card.
Pulse Echo Sonar Meter version 1.0
Updated At: 2015-02-25
Disclaimer
Official Google Play Link
We do not host Pulse Echo Sonar Meter on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
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