THE THEORY AND MEASUREMENT OF THE RADIATION FROM PANELS

Abstract : Previous theory by Smith, Lyon and Maidanik on radiation from finite panels has been reviewed. It is found that energy is radiated from a panel by three types of modes: corner modes, edge modes and surface modes in that order of efficiency. The panel is most efficient at radiating energy above the critical frequency when only surface modes are present and the panel behaves essentially as a piston. The radiation resistance, the total resistance, and the coupling factor of a panel were measured both when the panel was baffled and when it was unbaffled. The measured results are compared with previous experimental results of Maidanik and with theoretical predictions. In general the agreement is encouraging. (Author)