The engine noise rises only slightly as I speed along.

我一路高速行驶时，发动机的噪音只提高了一点点。

youdao

So a direct method to reduce the engine noise is to insulate the exterior radiation noise.

因此对发动机进行降噪一个直接的方法就是对表面噪声进行屏蔽。

youdao

Because the hydraulic valve plunger automatic control valve clearance is zero gap, simultaneously may reduce the engine noise.

由于液压挺杆自动调节气门间隙为零间隙，同时可降低发动机噪声。

youdao

The passengers in the aeroplane flying low overhead do not pay for the disturbance the engine noise causes on the ground.

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At one point, Osha rolled down the windows so we could hear the engine noise and compare it to the lack of noise we heard with the windows up.

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The witness said he did not hear any irregular engine noise when the helicopter went past and the height and speed of the craft were normal.

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