E = Young’s Modulus of the Material

Panel damping loss factors are estimated in full octave frequency bands with standard 1/3 octave band center frequency using a finite element model of a rectangular plate mechanically exited at a single point. The Impulse Response Decay Method (IRDM) and the Random Decrement (RD) techniques are studied for a range of loss factor from 0.001 to 0.1. The effect of considering varying numbers of response points was the primary focus. The effect of alternative time-domain filtering schemes for the RD method is also considered