Adaptive Audio Array

For EECS 452: Digital Signal Processing Laboratory, three peers and I were tasked with creating a project that performed real-time digital signal processing. Our group designed an acoustic phased array with a camera for listener detection. The speakers focus the region of highest volume on the listener. The project was able to form a beam of sound and direct it around a space, but was not able to fix the position of the beam to the user. As a fallback solution, the speakers alter their volume with distance from the target. This still focuses the region of highest volume on the listener but to a lesser degree. A Raspberry Pi 4 acts as the master for five Teensy 4.1s which each drive a speaker through an audio shield. The camera collects five frames per second and performs background subtraction to determine the position of the listener.