| 1. | Influence of inlet air noise on engine noise
进气噪声对内燃机整机噪声的影响 |
| 2. | With the development of vehicle noise control technology , engine intake noise con - trol has become the emphasis
随着汽车噪声控制技术的发展，进气噪声已成为汽车噪声控制的重点。 |
| 3. | Nearly all engines are equipped with air cleaners , which help reduce the air inlet noise to a secondary sound source
一般发动机均装有空气滤清器，进气噪声即可有较大衰减，成为次要声源。 |
| 4. | Designing air cleaner with good performance of noise reduction is one of the effective ways for the intake noise control
设计消声效果良好的空气滤清器是控制发动机进气噪声的有效措施之一。 |
| 5. | Aerodynamic noises radiated directly to the atmosphere include the air inlet noise , the exhaust noise and the cooling fan noise
直接向大气辐射的空气动力噪声包括：进气噪声、排气噪声、冷却风扇噪声。 |
| 6. | As the research on the subject at home is not clear and systemic , it is important to solve the problem
但是目前国内对进气消声的研究还不系统，因此对进气噪声的产生机理及控制技术的研究已经成为一个亟待解决的问题。 |
| 7. | The air inlet noise is related to designing factors like the air inlet mode , the inlet valve structure , the cylinder diameter as well as the cam curve
进气噪声与发动机的进气方式、进气门结构、缸径、凸轮型线等设计因素有关。 |
| 8. | For turbo - charged engines , due to the high rotating speed of the turbocharger , the air inlet noise is much higher than non - turbo - charged engines
对于采用涡轮增压的发动机，由于涡轮增压器的转速一般较高，因此其进气噪声明显高于非涡轮增压的发动机。 |
| 9. | For one same engine , the noise level is highly dependent on the rotation speed . when the rotation speed doubles , the air inlet noise can increase by 10 to l5db ( a )
对于同一台发动机来说，受转速的影响最大，转速提高一倍可导致进气噪声增加10 ~ l5db （ a ） 。 |
| 10. | Accelerating noise was measured and analyzed for a passenger car , the inlet air noise of its engine has been found to be the main noise source during the car accelerating period
运用该技术对某汽车的加速噪声进行测量和分析，发现发动机进气噪声是该车主要的加速噪声源。 |
