Estimation of the Pressure of Structure-Borne Sound Radiated by an Enclosure : Theory and Basic Examination by Experiments

A method of estimating the pressure of structure-borne sound included in noise radiated by an enclosure containing a machine that produces both noise and vibration is proposed. In this method, estimation is carried out using accelerations measured when the machine is in operation and transfer functions determined when the machine stops its operation. Specifically, the accelerations are ones measured at the points on the enclosure where the machine is connected to the enclosure, and the transfer functions are ones determined as complex ratios of the accelerations at the connecting forces to the connecting points from outside the enclosure. First, the theory of the method is derived and then its validity is the method is derived and then its validity is ascertained by experiments.