Diesel Noise Reduction Based on Sound-insulating Treatment

The noise radiation from ZS1110 diesel engine surface is measured and analyzed with near field spectral analysis.After the measurement,the main noise radiation sources are found out.Experiments of sound insulation and damping are carried out in this paper.Experimental results show that sound insulation is more efficient than damping in noise reduction.The engine noise is reduced 1.4 dB(A) by the sound-insulating treatment.