ON ACOUSTIC RADIATION-RESISTANCE OF PLATES

It is reported that when both sides of a plate radiate into a reverber ant room, the radiation resistance obtained experimentally is approxim ately half of the Values obtained using theoretical expression. Hence, it was suggested to use plate area as the radiating area instead of u sing double the plate area as radiating area which is not logical. In this paper the reasons for the above anomaly are investigated. It is f ound that the error is not in the radiating area but in the expression for radiation resistance itself. New expressions for radiation resist ance are suggested. Experimental results compare well with the theoret ical results. (C) 1998 Academic Press Limited.