mediocrity
发表于 2025-3-30 08:42:37
Michael Fingerle,Mandy Röder,Anna R. MüllerMany noise control problems arise indoors where the reflective nature of the walls affects the build up of noise energy from a source. Energy is also transmitted through walls from one room to another. The mechanics of reflection and transmission therefore has a strong influence on the sound levels to which we are subjected inside buildings.
Forage饲料
发表于 2025-3-30 12:39:49
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使成波状
发表于 2025-3-30 17:18:33
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嬉耍
发表于 2025-3-31 00:00:49
Nantje Otterpohl,Elke WildThe reflection and transmission coefficients of plane monochromatic waves have several universal properties which do not depend on the type of medium stratification. We begin this chapter with a discussion of the symmetry properties of the transmission coefficient which are retained upon reversion of the direction of wave propagation .
Pulmonary-Veins
发表于 2025-3-31 01:19:56
Bärbel Kracke,Peter NoackBietet umfassenden Überblick in zentrale Aspekte der individuellen Erziehung und Entwicklung über die gesamte Lebensspanne.Verfasst von renommierten Experten.Multidisziplinäre Sichtweise mit wertvolle
Militia
发表于 2025-3-31 06:12:40
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tic-douloureux
发表于 2025-3-31 10:19:46
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衰弱的心
发表于 2025-3-31 16:15:17
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外露
发表于 2025-3-31 17:33:19
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sigmoid-colon
发表于 2025-3-31 22:32:23
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