3d-Mapping Of Multiple Mirror Sources In A Room: A Two Channel Intensimetric Method.

A large lecture theatre was analyzed by using a 3D intensimetric measurement method. Sweep signal providing the excitation of the environment was sent to an isotropic source. Sound intensity probe was positioned in some test points of the room and sound intensity vector decay was measured for each of them. The sound board of a PC was utilized to acquire couples of impulse responses for each sound intensity vector component. These signals were combined by using an algorithm implemented in Lab VIEW. Mirror sources were localized and visualized in a three-dimensional map for each measurement point. Resuls are presented as orthogonal projections and 3D-diagrams.