拖拉机驾驶室内饰吸声对噪声的影响
The Effect of Sound-absorbing Lining on Interior Noise of Tractor Cab
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摘要: 拖拉机驾驶室内噪声主要由直达声和混响声迭加而成,其中混响声占有重要地位,而混响声的大小和驾驶室的内饰密切相关。该文从理论上对驾驶室采用多种吸声材料内饰吸声处理后的噪声级进行了分析计算,并与试验结果进行了比较,两种结果基本吻合。对拖拉机驾驶室采用内饰吸声后,可使室内耳旁噪声降低2.3~3.1dB(A)。Abstract: Interior noises in tractor cab are composed of direct sound and reverberation sound.The reverberation sound which has a great contribution on the noise is concerned with the lining of cab wall.In this paper the noise level has been calculated after the sound was absorbed by tractor cab wall.The results were verified by experiment.The interior noise is reduced 2.3~3.1dB(A)after sound-absorbing lining.