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相关概念视频

Interference: Path Lengths01:10

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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...
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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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Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
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Echo

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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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Gain01:15

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Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
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Time and frequency -Domain Interpretation of Phase-lag Control01:21

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Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
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相关实验视频

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影响流分离的因素 基于interaural相差的线索.

Nicholas R Haywood1, David McAlpine2, Deborah Vickers1

  • 1Department of Clinical Neurosciences, The University of Cambridge, Cambridge, UK.

Trends in hearing
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PubMed
概括

声间相差 (ΔIPD) 可以通过特定的声音包裹和短的间隔来帮助听觉流分离. 然而, ΔIPD 的

关键词:
听觉场景分析 听觉场景分析双耳式听力 双耳式听力双耳一体化 双耳一体化声道间的相位差异不同.流的分离 流的分离

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科学领域:

  • 听觉感知是一种听觉感知.
  • 精神声学是一种精神声学.
  • 听觉场景分析 听觉场景分析

背景情况:

  • 声间时间差异 (ITD) 通常是听力流分离的弱信号.
  • 耳间相差 (ΔIPD) 和频率差 (ΔF) 是其他影响听觉感知的双耳线索.

研究的目的:

  • 调查 ΔIPD 的有效性,作为听觉流分离的提示.
  • 检查刺激外形状和刺激间隔 (ISI) 对基于 ΔIPD 的分离的影响.
  • 评估 ΔIPD 在审计整合任务中的作用.

主要方法:

  • 听众报告说,他们感觉到纯色序列的整合或分离.
  • 刺激在 ΔIPD, ΔF,信封形状 (准形,快速攻击-缓慢释放,缓慢攻击-快速释放) 和 ISI 方面有所不同.
  • 一个检测任务在审计整合场景中评估性能.

主要成果:

  • 与缓慢的攻击-快速释放相比,快速攻击-缓慢释放的包裹增强了基于 ΔIPD 的分离.
  • 基于 ΔIPD 的隔离与 ISI 增加,而基于 ΔF 的隔离则减少.
  • 基于 ΔIPD 的分离在复杂任务中减少,这表明了情境敏感性.
  • 增加 ΔIPD 对整合任务的表现的影响最小.

结论:

  • 在优化条件下 (特定的包裹,简短的ISI) ΔIPD可以成为听力流分离的有效提示.
  • 双耳时间整合可能会限制短时间ISI的隔离.
  • ΔIPD的有效性在很大程度上取决于实验环境和任务需求.
  • 听众可以有效地忽略 ΔIPD 当需要听觉整合以获得最佳性能时.