Improvement of Sound Quality for the Vehicle HVAC System Using Optimum Layout of Damping Material

제진재의 최적배치를 이용한 차량공조시스템의 음질개선

  • 오재응 (한양대학교 기계공학부) ;
  • 황동건 (한양대학교 기계공학과) ;
  • 박상길 (한양대학교 기계공학과) ;
  • 윤태건 (한양대학교 기계공학과) ;
  • 심현진 (한양대학교 기계공학과) ;
  • 이정윤 (경기대학교 기계시스템디자인공학부)
  • Published : 2006.06.01


The reduction of the Vehicle interior noise has been the main interest of NVH engineers. The driver's perception on the vehicle noise is affected largely by psychoacoustic characteristic of the noise as well as the SPL. In particular, the HVAC sound among the vehicle interior noise has been reflected sensitively in the side of psychology. In previous study, we have developed to verify identification of source for the vehicle HVAC system through multiple-dimensional spectral analysis. Also we carried out objective assessments on the vehicle HVAC noises and subjective assessments have been already performed with 30 subjects. In this study, the linear regression models were obtained for the subjective evaluation and the sound quality metrics. The regression procedure also allows you to produce diagnostic statistics to evaluate the regression estimates including appropriation and accuracy. Appropriation of regression model is necessary to $R^2$ value and F-value. And testing for regression model is necessary to independence, homoscedesticity and normality. Also we selected optimum layout of damping material using Taguchi method. As a result of application, sound quality is improved more quietly, powerfully, even though costly, and smoothly.


HVAC;Psychoacoustics;Sound Quality;Regression Analysis;Damping Material;DOE


  1. Zwicker E. and Fastl H., 1990, 'Psychoacoustics Facts and Models,' Springer-Verlag, Berlin Heidelberg, pp. 61-267
  2. Park, D. C. and Chung, S. G., 2002, 'Development of Interior Sound Quality on a Passenger Car,' Journal of the KSNVE, Vol. 12, No. 5, pp. 342-349
  3. Hur, D. J., Cho, Y., Kim, H. S., Lee, G. S. and Park, T. W., 2000, 'Model Development and Analysis of the Car Interior Sound Quality,' Journal of the KSNVE, Vol. 10, No. 2, pp. 254-260
  4. Im, D. H., 1999 'A Study on the Assessment of Product Sound Quality : Application to Vacuum Cleaners,' the Degree of Master of Engineering, KAIST
  5. Oh, J. E., Hwang, D. K., Aminudin bin Abu, Lee, J. Y. and Kim, S. S., 2004, 'Coherent Analysis of HVAC Using the Multi-Dimensional Spectral Analysis,' Journal of KSPE, Vol. 22, No. 8, pp. 143-150
  6. Tako Hiromoto, 2001, 'Sound Quality Study and its Application to Car Interior and Exterior Noise,' Spring Annual Conference, KSNVE, pp. 19-26
  7. Kang, B. S. and Kim K. S., 2003, 'Modem Statistic Analysis,' Muyok Pub., pp 394-396
  8. Park, S. H., 2003, 'Modem Design of Experiments,' Minyoungsa., pp 234-237
  9. Yi, S. B., 2002, 'Design of Experiment Exercise Examples,' Eretec, pp 88-90