Contribution
Experimental investigation into the properties of an acoustic laboratory setup to replicate the sound radiation model of a simply supported plate in a rigid baffle
* Presenting author
Abstract:
To test methods for active noise and vibration compensation, the mathematical model of a rectangular simply supported plate in a rigid baffled is reproduced experimentally in a laboratory. In order to verify the accuracy of this replication, the assumed boundary conditions are examined by using harmonic signals for excitation. The investigated frequency range comprises the first 20 natural frequencies of the plate and ranges in the first quartile below the coincidence frequency. The acoustic boundary conditions are tested by comparing the calculated sound field of the circular piston radiator in a rigid baffle with the measured sound field generated by a loudspeaker of the same size mounted in a large wooden wall. The structural boundary conditions are verified by comparing the normal vibration velocity calculated using the model of the simply supported plate and the velocity field measured on a plate using a laser vibrometer.