interior noise level meaning in Chinese

内部噪音级

Wholly reducing bus interior noise level needs to consider multi - paths by which several noise sources radiate sound into the bus
摘要整体降低客车车内噪声水平的需求日益迫切。
Ameliorating the vehicle interior acoustics circumstance and debasing the vehicle interior noise level are the question that governments and manufacturers faced to together . the research on the vehicle interior noise has been recognized
改善车辆内部声学环境，降低车内噪声水平，是各国政府和车辆生产厂家共同关注的问题，汽车车内噪声的研究已受到普遍重视。
So a new method is proposed that combines the traditional transfer function and coherence function analysis with the statistics of frequencies to obtain the dominant frequencies , which can reflect how the noise sources influence the bus interior noise level in frequency domain , and which will provide reliable references to make up plans in reducing the bus interior noise
对此提出了在传统的传递函数和相干函数分析的基础上结合频率统计，选出优势频率的方法来考察噪声源对车内噪声的影响，为制定客车车内噪声治理方案提供了可靠的依据。