双层客车车内降噪的研究

A STUDY ON NOISE REDUCTION INSIDE A DOUBLE-DECK AUTOMOBILE

公路双层客车车内噪声普遍超过国家规定。根据吸声、隔声和阻尼减振原理，对某型双层客车后部结构提出了改进措施，使其车内噪声达到了国家规定。

It is common that inner noise of a double-deck automobile often goes beyond the standard set by the state.An improved back structure is proposed according to the principle of sound absorption. sound insulation and damping vibration.It can lower inner noise so as to meet the state standard.