Microprocessor implementation of the sound source location process based on the correlation of signals

Abstract

Sound direction estimation can be used in many different mechatronic systems, while the use of bare-metal programming microcontrollers allows for miniaturization and broadening the range of applications. The paper presents a microprocessor implementation of the system allowing to determine the azimuth for the source of sound. The device operates based on the measurement of the phase shift of the incoming signal to two spaced apart microphones. The algorithm based on calculating the correlation of sound signals using the FFT algorithm was used in the research.