郊外
发表于 2025-3-23 10:05:29
https://doi.org/10.1007/978-1-349-04694-2The most common solution to problems due to vibration impact into buildings or the ground, is to isolate the machinery, engines or other aggregates from their bearing foundations by spring elements. Applications for this technique, called elastic decoupling, are
生存环境
发表于 2025-3-23 17:13:42
An Analysis Built on Global MeasurementThis chapter deals with the sound transmission between rooms of a building (or from the outside into the building respectively). This subject of practical importance concerns the noise control of indoor rooms with respect to traffic noise and residential noise. Noise, penetrating a room from the exterior, can have two possible reasons:
平静生活
发表于 2025-3-23 18:44:45
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indemnify
发表于 2025-3-24 00:55:03
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色情
发表于 2025-3-24 04:10:49
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压倒
发表于 2025-3-24 06:39:34
Propagation and Radiation of Sound,As we know from experience (and as will be shown in the next sections) sound sources have a directivity. The sound level perceived by the observer is not dependent on the distance from the source alone. If the source is rotated, the level changes with angle.
不可救药
发表于 2025-3-24 13:04:22
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自爱
发表于 2025-3-24 18:14:00
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逗留
发表于 2025-3-24 19:40:51
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AV-node
发表于 2025-3-25 01:09:36
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