舒适噪声产生技术(CNG)就是发送端在静音期间发送一些分组信息帧，从而生成使用户感觉舒服一些的背景噪声。
Comfort noise Generator (CNG) is that sender sends a few frames in silent time and receiver generates comfortable background noise using those frames.
缺点主要是由于转矩波动引起的振动较大，易产生噪声，进而使车辆的舒适性和平顺性降低。
But its major disadvantages are the big vibration caused by torque moment fluctuation, which leads to high noise, and further affects the comfortableness and smoothness of automobiles.
高速列车在进出隧道时，会产生一系列气动效应，以致于在隧道周围形成噪声污染，降低列车乘坐的舒适度。
When high-speed train going through tunnel, a series of aerodynamics effects will be created, which are harmful to passengers and environment.
高速列车在进出隧道时，会产生一系列气动效应，以致于在隧道周围形成噪声污染，降低列车乘坐的舒适度。
When high-speed train going through tunnel, a series of aerodynamics effects will be created, which are harmful to passengers and environment.
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