Estimation of noise power radiated from gear bodies. 2nd Report: The estimation and measurement of the radiated sound power from circular plates with a solid shaft.

The circular plates with a solid shaft were dealt with as a simple model of gear bodies, and the three parameters for estimation, the total loss factor, the radiation loss factor, and the driving point mobility of the plates, were calculated according to the theory and formulae derived theoretically in the first report. They were also measured. By using these calculated and measured parameters, the sound power radiated from the plates was estimated and was compared to the one measured by means of the sound intensity method. The estimated absolute frequency spectrum of the radiated sound power coincided well with the measured one. Then it was revealed that the estimation theory of radiated sound power was correct and useful.