ACOUSTIC REFLECTION PATH DISCRIMINATING METHOD, COMPUTER PROGRAM, ACOUSTIC REFLECTION PATH DISCRIMINATING DEVICE AND ACOUSTIC SIMULATION DEVICE

摘要

PROBLEM TO BE SOLVED: To efficiently discriminate the effectiveness of an acoustic reflection path obtained by a virtual image method. SOLUTION: Whether a reflection point P exist on a wall surface W is determined by the order of vertexes ajwhich prescribe the wall surface W made of polygons, their three-dimensional coordinates and the three-dimensional coordinates of the reflection point P that is on the reflection path and obtained by the virtual imaging method. At that time, an angleθjwhich is made by two adjacent vertexes ajand aj+1of the wall surface W at the reflection point P and has a sign is obtained, and discrimination is made to determine whether the reflection point P exists on the wall surface W, based on the sumΣθj, which is the sum of the angles having signs, obtained between all the adjacent vertexes a1to a5. COPYRIGHT: (C)2006,JPO&NCIPI