Pulse Echo Sonar Meter for android

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. Free & No Ads.

RECORD_AUDIO Permission to use microphone to detect the echo. WRITE_EXTERNAL_STORAGE Permission is so that data can be saved.


• Sampling frequency kHz.
• Sampling duration 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 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.

Similar Apps

Manga Searcher – Manga Reader free download

Manga Searcher is a free manga reader for manga fans Simple to use, what you need to do is select and read.

Mahjong 3 app free

Presenting new title by 1C Wireless – Mahjong 3! There are three game modes for you to enjoy: • Classic - Original Mahjong Solitaire. Play as long as you want! • Time Attack - Clear all matching tiles as quick…

Learn Recipes in Hindi download

App content is in hindi language. Different types of recipes have been included like sweet dishes, vegetable, vegetarian, low calorie etc. Cooking procedure and ingredients of each recipe has been given. The ways of serving recipes and giving final touch…