楕円形送受音子における音響レスポンス

概要

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Ultrasonic response of an elliptic receiver to an elliptic piston source surrounded by an infinite rigid baffle is given as the total acoustic pressure which is derived from the sum of the acoustic velocity potential on the surface of the receiver. Following conditions are necessary for the deduction of the result : 1. The surface of the receiver is similar to that of the source. 2. The surfaces have a common center axis and the long radius on the surface of the receiver is parallel to that of the source. 3. The velocity of the source is uniform over the surface and is sufficiently small. 4. The effect of multiple reflection is omitted. 5. The medium through which the signal propagates is uniform. The result obtained here has a form of double integral representation. When the distance is sufficiently small, the result is approximated with the "planewave response." For sufficiently large distance, the "spherical-wave apporximation" is allowed for the formula. Numerical calculations for the acoustic response versus distance between the source and receiver given for several cases. Numerical calculations for the radiation impedance at an elliptic piston source are given for two cases.
独立行政法人海上技術安全研究所の論文
1983-07-31