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 a large number of robots enter the manufacturing industry, the safety issue of robot obstacle avoidance becomes a key challenge. A flexible ultrasonic sensor is proposed to meet the requirement of ...

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 ...