Sound Radiation from Transversely Vibrating Flat Plates into Waters

The sound radiation of transversely vibrating flat rectangular plates with and without ribs is measured. For comparison, a corresponding model (subdivided Sell-type transducer) is investigated, too.

The experimental results are compared with calculations based on a simplified velocity distribution on the plate. The far-field radiation characteristics computed from this distribution by a Fourier transformation are in good agreement with the radiation patterns obtained in a shallow water basin.

The total radiated power is measured in a reverberation tank for waterborne sound. The design of this tank is based on a new principle with sound-soft lining. The radiation coefficients measured in model experiments are in good agreement with approximate calculations after Gösele.