RADE
发表于 2025-3-25 07:11:56
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行为
发表于 2025-3-25 10:45:55
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sclera
发表于 2025-3-25 14:01:36
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轻快走过
发表于 2025-3-25 16:46:59
Acoustic Pressure and Intensity Distributions in Finite Length Active Noise Control Systemsontours and maps of intensity vectors yields results which are in good accord with experimental findings. It appears that a reduction in the level of reflections in cancelling source location is acheived when a lining covers one wall in the duct. Suitable adjustment of the internal source impedances
inclusive
发表于 2025-3-25 21:53:02
The Active Minimization of Harmonic Enclosed Sound Fieldsomplex strengths of a number of “secondary sources” of sound introduced into the enclosure. For a given number and location of secondary sources, there is a unique set of complex source strengths which minimises this potential energy. This analysis is applied to the case of a lightly damped enclosur
针叶
发表于 2025-3-26 00:44:50
Sound Generation in the Ocean Under a Turbulent Airflowor various features in the problem of sound generation in the ocean. Some particular situations are examined in detail. It is shown that, whenever the ocean surface is non-linearly deformed, any quadrupole radiations become negligible; the most significant sound arises from surface motions. This sur
启发
发表于 2025-3-26 05:25:39
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猜忌
发表于 2025-3-26 09:27:37
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傲慢人
发表于 2025-3-26 15:23:53
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NICE
发表于 2025-3-26 17:59:53
The Political Economy of the USSRlicit and exact analytical solution for a diffraction problem in linear wave theory, relating to a plane wave incident upon a thin opaque semi-infinite screen with a straight edge; afterwards, Macdonald, Herglotz and others derived the corresponding solution for a point source and a wedge formed by