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황대선(Dae-Sun Hwang),허덕재(Deog-Jae Hur),황효성(Hyo-Sung Hwang) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Among various elements to affect customer's evaluation of product quality, BSR(Buzz, Squeak, Rattle) are considered to be a mostly contributing factor. This paper describes the study of the sound quality evaluation index development for the squeak and rattle. The sound quality evaluation index for the squeak and rattle is composed of the highly correlated sound physical parameters. So that, the highly correlated sound quality physical parameters (sharpness, transient loudness, fluctuation strength, tonality etc) is found by correlation, cluster and factor analysis method. And, it looks into the 2nd sound quality parameters in the well-represented parameters of subjective characteristics of BSR noise such as Crest Factor, Skewness, Kurtosis of transient SQM parameters.
황대선(Dae-Sun Hwang),허덕재(Deog-Jae Hur),황효성(Hyo-Sung Hwang) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Here are the basic concept, components of conventional transfer path analysis (TPA) methods using data of the frequency domain and the comparison of direct and indirect methods quantifying noise sources. The differences of the time domain TPA & frequency domain TPA are showed and the convolution calculation algorithm for the process of the time domain TPA is observed. The algorithm is classified into two methods. One is the method which uses only the time data and the other is the method which uses the time & frequency data. And the former is also classified into two methods. One is a view-point of input data and the other is a view-point of output data. The latter uses algorithms of the FFT convolution and overlap-add method.