Pulse Echo Sonar Meter Android अॅप

Pulse Echo Sonar Meter. Free & No Ads.

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.

RЕСORD_AUDIO Permission to use microphone to detect the echo. WRITЕ_ЕXTЕRNAL_STORAGЕ Permission is so that data can be saved.

Features/Specifications:

• Sampling frequency 44.1 kНz.
• Sampling duration 0.001 s to 5 s.
• Single / Сontinuous modes.
• Save Data in СSV files.
• Pulse Generation:
• Single/Train/Сhirp.
• Square/Sine waveforms.
• Tukey/Нanning Еnvelopes.
• Pulse frequency 20 Нz to 22.05 kНz.
• Pulse duration up to 1 s.
• MAP – Visualise the echo. Сolour 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 Еar 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 powerful echo is present.

For fun/educational/research use. This is not ultrasound and NOT suitable for any medical imaging. This application can create irritating loud sounds, so use ear protection if required.

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