STUDY OF THE COMPLIANCE OF A SOUND INTENSITY MAPPING DEVICE LOCATED IN SPACE BY COMPUTER VISION WITH CONVENTIONAL CERTIFIED METHODS FOR MEASURING SOUND POWER

摘要

A new real-time sound intensity mapping device, the I-Track, proposes a mean of measuring sound power that is based on sound intensity probe sweeps over planar surfaces coupled to a machine vision algorithm that associates each sound intensity measurement with coordinates in a common spatial reference. The innovation of this method relies, in particular, in the use of Fresnel ellipses and Delaunay triangulation in the process of averaging and interpolating the intensity data over the entire scanned area, which can subsequently be integrated to obtain the sound power. The main advantage of the I-Track device over conventional sound intensity measurement system is that the implemented spatial-based procedure allows obtaining contour maps of intensity without performing tedious point-by-point measurements by simply scanning over the area without following prescribed patterns as long as the whole area is entirely covered [1].