Abstract
Two wooden structures resembling ribbed flower boxes geometrically scaled in the ratio of 4 to 1 were driven in air and water with sinusoidal forces; transfer impedance and radiated sound measurements were made. It was found that the resonant frequencies of the lower modes of the two structures were in the ratio of 1 to 4 within a few percent; reciprocal transfer impedance measurements were essentially idential; transfer impedance measurements at symmetrical points of the same structure were almost idential; and at up to 600 cps—referred to the larger of the two vessels—the impedance magnitude and radiated sound averaged over small frequency ranges scaled in the ratio of 16 to 1.
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