Hardware Design of Signal Processing for a Novel Audio Beam Loudspeaker Based on DSP

摘要

While generating audible sound with high directivity utilizing the nonlinear propagation effects of ultrasonic in the air, a solution based on DSP (digital signal processor) is presented to solve the problem of distortion in audio beam loudspeaker, and the hardware system for signal processing is designed. Compared with the idealized output simulated from MATLAB, the real output of the hardware system is satisfactory. Moreover, the cost of the design is much lower than that of the past solution using pure circuit or FPGA, and the modifiable performance of DSP program makes the early research work of audio beam loudspeaker more convenient. The design is expected to accelerate the commercialization of the audio beam loudspeaker