わずか斜めに入射する球面波の有限長剛円柱からの反射

概要

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In this paper, an analytical technique for calculating the amplitude of reflected sound wave from a cylindrical target of finite length for its slightly oblique incidendce is described. This theory is treated on the assumption that a receiver is located separately from a transmitter. The formulas for the reflectivity are derived approximately under certain geometrical restrictions. The reflectivity is termed as the "directional sound reflectivity of the cylindrical target, "which is defined as the ratio of a reflectional sound pressure from a target to a calculated one which is treated due to the theory of geometrical optics. To verify the validity of the approach, some experiments are performed in air at the frequency of 39. 80 kHz. Experimental results show good agreement between the calculated and the measured values and this confirms the usefulness of the present technique to calculate the reflection of sound waves from a cylindrical target.
1982-12-25