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.

Features/Specifications:

• 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

Dreamcitymetropolis Apk

Dream City: Metropolis App

As mayor of Dream City: Metropolis, you’ll build a city of your dreams and explore a beautiful 3D world alongside a cast of colorful characters! CREATE YOUR OWN BUSTLING METROPOLIS - Grow your industries to become a world-class city builder!…

Free Chess free apk

Chess King is the best free Chess game. Touch the screen, move and drop the pieces, checkmate, Win! Powerful Chess AI engine, super Chess Tutor, amusing challenge mode, increase your ranking and become a Master of Chess. Features: - 6…

Bouncing Ball Apk

Bounce the ball and avoid touching the spikes. Collect floating power ups to change the game's colors.