Ultrasound detection and digital processing device

Circuits and Systems for Receiving, Transmitting and Signal Processing

The device has been developed that registers ultrasound with a frequency of up to 100 kHz, which converts it into sound in real time with a delay of less than 2 ms and reproduces the received sound. The signal frequency is changed using the fast Fourier transform and the selection of the dominant frequency in real time on a microcontroller with an ARM Cortex M3 core. The preservation of the pulse envelope with a time resolution of up to 1.2 ms and the good sensitivity of the used MEMS microphones in the ultrasound region make it possible to use the device for detecting and classifying animals' echolocation signals. The low cost of the used components and their accessibility make it possible to use the device in the domestic sphere to monitor the performance of devices that emit ultrasound, and to monitor the absence of ultrasonic noise, which can adversely affect a person's well-being during prolonged exposure.