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相关概念视频

Sound Waves: Interference00:53

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Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
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Voltage Doubler Circuit01:23

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A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
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减噪的气泡窗:一个对两个.

Simon Beelen1,2, Marten Nijhof3, Christ de Jong3

  • 1Physics of Fluids Group and Max Planck Center for Complex Fluid Dynamics, J. M. Burgers Centre for Fluid Dynamics, University of Twente, P.O. Box 217, 7500AE, Enschede, The Netherlands.

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概括
此摘要是机器生成的。

在两个气泡窗之间分割空气流,可以显著提高在海上车时的噪音降低. 这种双窗的方法提高了声学性能,为保护海洋生物和遵守法规提供了更具成本效益的解决方案.

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科学领域:

  • 声学 声学 在声学方面
  • 海洋工程 海洋工程
  • 环境科学 环境科学

背景情况:

  • 气泡窗对于减轻海上车造成的噪音污染至关重要,保护海洋生态系统.
  • 目前的泡幕运营面临成本和满足严格噪音法规的挑战.

研究的目的:

  • 与单个窗相比,研究将空气流分成两个单独的气泡窗的声学有效性.
  • 优化压缩空气的使用,以提高降噪效果.

主要方法:

  • 双和单个泡窗配置的实验测试.
  • 数字建模来模拟泡幕的性能.
  • 插入损失和声障碍效应的分析.

主要成果:

  • 将空气流分成两个气泡窗导致测量的插入损失增加了多达11dB.
  • 双窗系统即使在空气流量减半的情况下也保持了反射性能.
  • 空气分布的时间变化被确定为性能变化的关键因素.

结论:

  • 运行两个气泡窗是一种比单个窗更有效的降噪方法.
  • 考虑到模型中的多重差距,可以提高预测泡窗性能的准确性.
  • 这种优化的方法为海洋建筑中的环境噪音控制提供了有希望的解决方案.