基于心理声学分析的多工况柴油机辐射噪声特性研究

Research on Diesel Radiation Noise Characteristic of Multi-Operating Conditions Based on Psychoacoustics Analysis

以声品质主观测评结果差异性较大的两款柴油机为研究对象,同时采用传统噪声评价指标与心理声学法对两款柴油机辐射噪声进行了对比分析,并结合声品质主观评价结果分析了引起差异性较大的原因,明确了典型心理声学指标。结合柴油机实际运行工况,对比分析了两款柴油机在不同运行区间辐射噪声声品质变化规律,为改善柴油机辐射噪声提供了理论支撑。

Radiation noise of two engines with different subjective evaluation results of sound quality was compared and analyzed with traditional noise evaluation index and psychoacoustic approach,which were combined with subjective evaluation results of sound quality to analyze the cause of large difference of radiation noise.The typical psychoacoustic indexes were determined.Combined with practical operating conditions of diesel engine,the varying law of the sound quality of radiation noise in different operating areas of those two engines was compared and analyzed,which provided theoretical support for improving the radiation noise of the diesel engines.