Estimating the Angle of Arrival of the Sound Source using Microphone-Array Beamforming

Abstract

In a speech recognition device, to track and locate the sound source, the device needs calculate the direction and angle of arrival of sound. This is done with the use of a microphone-array. A microphone-array is a MIMO device that can track, locate the sound source and can also help to identify the type of sound source from the surrounding environment. Different array types can be used depending on the equipment available. Various types of array geometry exist for different applications. In this project, we are designing a Linear Microphone-Array using the concept of Delay-and-Sum Beamforming. Beamforming is a signal processing technique used in audio conferencing systems to increase the Signal-to-Noise Ratio (SNR) of the source sound signal. After using the concept of beamforming, we will be able to estimate the angle of arrival of sound. In this project, we are estimating the angle of arrival using MATLAB and proving the concept of DAS beamforming using LabVIEW.