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相关概念视频

Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

88
Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
88
Traveling Waves: Lossless Lines01:27

Traveling Waves: Lossless Lines

126
The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx  and a shunt capacitance CΔx.
126
Echo01:06

Echo

493
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.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
493
Interference: Path Lengths01:10

Interference: Path Lengths

1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
Transmission-Line Differential Equations01:26

Transmission-Line Differential Equations

243
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
243
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

129
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
129

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相关实验视频

Updated: Jun 11, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

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Published on: January 20, 2023

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使用变长延迟线进行经过车辆的声学模拟的框架.

Stefano Damiano1, Luca Bondi2, Andre Guntoro3

  • 1Department of Electrical Engineering (ESAT), STADIUS Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Kasteelpark Arenberg 10, Leuven, 3001 Belgium.

EURASIP journal on audio, speech, and music processing
|October 7, 2024
PubMed
概括

TrafficSoundSim是一个开源的车辆噪声声学模拟器. 它使用源生成和传播模型准确地模拟路过的车辆,使得在没有记录数据的情况下可以对城市声音景观进行感知评估.

关键词:
声学模拟的声学模拟多普勒效应是一种多普勒效应.道路声学传播的传播方式交通噪音综合学 交通噪音综合学可变长度延迟线的延迟线是可以变化的.

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相关实验视频

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科学领域:

  • 声学和信号处理
  • 城市规划与环境科学

背景情况:

  • 交通噪音是影响人类活动的主要城市污染物.
  • 准确模拟单个车辆的声音对于噪音评估和减噪策略至关重要.

研究的目的:

  • 介绍TrafficSoundSim,这是一个开源框架,用于模拟路过车辆的声学特征.
  • 为了能够对交通噪音和个别车辆对城市声音景观的贡献进行感知评估.

主要方法:

  • 车辆的声音产生,结合道路/轮胎和发动机噪声.
  • 使用可变长度延迟线进行声学传播建模,包括空气吸收,地面反射和源向性.
  • 使用有限脉冲响应过器实现的脱源信号生成和传播阶段.

主要成果:

  • 交通SoundSim框架准确地模拟了车辆路过事件.
  • 产生的声音在功率光谱密度和精神声学指标方面与记录的事件有很好的匹配.
  • 模拟结果在感知上是合理的,验证了框架的有效性.

结论:

  • TrafficSoundSim提供了一个灵活的,数据独立的工具,用于对道路交通进行声学模拟.
  • 该框架支持对交通噪声建模,评估和减噪策略开发的研究.
  • 这个开源模拟器可以增强对城市声景的理解和管理.