August 2025 edition of Elektor is out. The IoT & Sensors edition has something for everyone, whether you’re looking for ...

This letter describes a robust voice activity detector using an ultrasonic Doppler sonar device. An ultrasonic beam is incident on the talker's face. Facial movements result in Doppler frequency ...

As part of my TIPE (Travaux d'Initiative Personnelle Encadrés), I developed an autonomous guidance system to assist visually impaired pedestrians. The device uses an ultrasonic sensor to detect nearby ...

In this paper, we present a single-chip 65 × 42 element ultrasonic pulse-echo fingerprint sensor with transmit (TX) beamforming based on piezoelectric micromachined ultrasonic transducers directly ...