Apparatus and Method for estimating position of acoustic source using Time Difference Of Arrival scheme based on sound wave directly transmitted from acoustic source and sound wave measurement reflected from the ground

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound source estimation technique, and more particularly, to a sound source estimation technique using a time difference between arrival (TDOA) technique between sound signal channels provided through a microphone array, The present invention relates to an apparatus and a method for accurately estimating a position of a noise source by assuming a virtual sensor on the ground using a signal of a sound wave transmitted after reflecting the ground surface. According to the present invention, a measured signal reflected on the ground surface has the same effect as measured by the existence of a virtual sensor on the opposite side of the ground, and can be used to produce an increased sensor combination.