对手
发表于 2025-3-28 18:10:01
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协奏曲
发表于 2025-3-28 20:08:51
Michael Kortstock,Gisbert Wermuthversely. A specific class of couplers, the so-called “transducers”, are of high technological relevance. Transducers transform mechanic to acoustic power and vice versa, based on .’s laws of induction and influence. This means that the transformation is linear, passive, and reversible. The fundament
CLOWN
发表于 2025-3-29 02:01:59
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大骂
发表于 2025-3-29 06:33:51
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严峻考验
发表于 2025-3-29 08:56:13
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辩论的终结
发表于 2025-3-29 12:21:55
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贿赂
发表于 2025-3-29 16:13:02
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Affluence
发表于 2025-3-29 20:23:22
https://doi.org/10.1007/978-3-322-84103-2ssipation causes spatial damping of the sound waves. The wave equation is modified to account for this fact. Effects considered in this context are dissipation during sound propagation in air, dissipation during sound propagation in porous media, reflection, scattering, and the degree of absorption
inscribe
发表于 2025-3-30 00:06:25
Die Untergliederung der Hauptabteilungen,h becomes complicated when treating sound fields inside rooms with complicated shapes like concert halls. A concept called geometrical acoustics is useful in these cases. Here sound beams are treated like optical rays so that the well-known reflection laws are applicable. The foundations of this con
hermetic
发表于 2025-3-30 07:15:15
Die Untergliederung der Hauptabteilungen,prevented, both regarding air-borne and structure-borne sounds. This chapter addresses relevant topics in this context, that is, radiation of air-borne sound by bending waves, and sound transmission loss of walls. The sound-reduction index and the sound transmission class are introduced as measures