[Alex Toussaint] did, and in thinking how such a machine might work he embarked on a path that eventually led him to create a fully functional ultrasonic 3D scanner. In writing it up he’s ...

Near-field beamforming divides the space directly in front of the microphone array into a 64x64x64 grid of 5cm voxels, and can locate a sound source in that 3d space. Alternatively, the system can ...