train noise

Generally, the vibration signal collected from the train mixs up much noise. In this paper, We use wavelet transform in signal to denoise, The result of emulation proves this method is effective especially on signal mixing up white noisy.

通常从机车上采集的振动信号混有大量的噪声，现利用小波变换进行降噪，仿真结果表明小波变换能够有效地去除信号中的噪声，特别适应于信号中混有白噪声。

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The main source of noise is aerodynamic noise which may be divided into three major parts: noise from vortex flow around the train, noise from boundary layer and noise from wake.

主要噪声来源为空气动力性噪声.它可分为3个部分：绕流声、附面层噪声与尾流噪声。

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The vibrations from the train faded into the noise of automobile traffic as we proceeded single-file toward the climb base.

火车驶过的震动逐渐被车流声淹没，我们排着纵队向起始点移动。

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Even though they are living in close quarters to a busy train station any noise has been muffled by special equipment.

虽然他们生活在繁忙的轻轨站旁，但是轻轨站的噪音却被特种设备消除了。

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The Effective Pass-by Duration of Train Running Noise

列车运行噪声的等效通过时间

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Pulls in nothing but wind and train noise.

除了风声和火车噪音什么也没录到。

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Geometrical Spreading Loss of Running Train Noise

列车运行噪声的几何发散损失

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In order to reduce the noise pollution induced by high speed train, noise barrier is widely used in modern high speed railway engineering at home and abroad.

为了降低噪声对周围环境的影响，声屏障技术在国内外高速铁路工程领域得到了广泛的应用。

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Experiments and Researches of Engine Valve Train Noise

发动机配气机构噪声试验研究

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Analysis of Train Rolling Noise Simulation

列车滚动噪声的仿真分析研究

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Study on Valve Train Noise of an Automotive Engine

车用汽油机配气机构噪声的研究

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Tests show that a passing-by subway train can produce a noise of 100 decibels. If someone is happening to be talking through earphones, the sound gets to his ears can amount to 120 decibels or more.

测试显示，地铁列车通过时产生的噪音达100分贝，如此时有人正好在用耳机通话，入耳的声音就会达到120分贝以上。

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With increase of the train speed, railway noise is becoming an environmental problem concerned by citizen and residents along the rail lines.

随着列车速度的提高，铁路噪声已成为城市与铁路沿线居民日益关注的环境问题。

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Excessive train noise not only affects the health of residents along the line, but also destructs buildings.

列车运行噪声的超标不仅影响了线路沿线居民的身体健康，而且伴随而来的振动，对沿线建筑物具有一定的破坏力。

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Study on High-speed Railway Train Operation Noise Impact Assessment and Prediction System

高速铁路列车运行噪声影响评价及预测系统研究

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An Investigation on the Effects of Train Noise on the Health of the Residents Living beside the Railway

火车运行噪声对铁路两侧居民健康影响的调查

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The horizontal direction of train running noise is a important character of train radiating noise.

铁路列车运行噪声的水平指向性是铁路列车噪声辐射的重要特性之一。

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The Horizontal Direction of Train Running Noise

列车运行噪声的水平指向性

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