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Sound Quality Evaluation Based on the Mahalanobis Distance for the Interior Noise of Driving Vehicles with Various the Tire Type

타이어 종류에 따른 차량 실내 소음의 Mahalanobis Distance 를 이용한 음질인덱스 구축

  • Jeong, Jae-Eun (Dept. of Mechanical Engineering, Seoul, Hanyang Univ.) ;
  • Yang, In-Hyung (Dept. of Mechanical Engineering, Seoul, Hanyang Univ.) ;
  • Park, Goon-Dong (Dept. of Mechanical Engineering, Seoul, Hanyang Univ.) ;
  • Lee, You-Yub (Division of Automotive Mechanical Engineering, Gunsan, Howon Univ.) ;
  • Oh, Jae-Eung (School of Mechanical Engineering, Seoul, Hanyang Univ.)
  • 정재은 (한양대학교 기계공학과) ;
  • 양인형 (한양대학교 기계공학과) ;
  • 박군동 (한양대학교 기계공학과) ;
  • 이유엽 (호원대학교 자동차기계공학과) ;
  • 오재응 (한양대학교 기계공학부)
  • Received : 2010.07.06
  • Accepted : 2010.10.08
  • Published : 2010.12.01

Abstract

The reduction of vehicle interior noise has been the main interest of NVH engineers. The driver's perception of the vehicle noise is strongly affected by the psychoacoustic characteristics of the noise and the SPL. The existing methods to evaluate the SQ for vehicle interior noise are linear regression analysis of subjective SQ metrics by statistics and the estimation of subjective SQ values by neural network. However, these methods strongly depend on jury tests, this leads to difficulties. To reduce the important of the jury tests, we suggest a new method using the Mahalanobis distance for SQ evaluation. And, the optimal characteristic values that influenced the results of sound quality evaluation on the basis by main effect. Finally, we developed a new method based on the MD method to evaluate sound quality. The result of noise evaluation revealed that the sound quality could be well improved by changing the structural characteristics of the vehicle.

사람이 소리를 듣는 것은 다분히 감정적이고 주관적으로 이루어진다. 따라서 소음 측정의 척도로 주로 사용되는 dB(A)와 같은 청감을 고려한 수치로 표현하기 어렵기 때문에 때와 장소, 차량에 따라 주관적이고 사람의 감정에 맞는 주관적 척도가 요구된다. 즉, 평가하고자 하는 음질인자 항목들은 독립적 관계가 아닌 서로 상관관계의 특성을 고려하여 음질 평가를 수행해야 한다. 그러므로 인간의 청감에 가깝고 정확한 음질 평가를 위해서는 음질인자 별 다변량 분석이 필요하다. 본 연구에서는 차량 주행 소음을 대상으로 특성인자간 상관관계를 고려해 시스템을 분석할 수 있는 마할라노비스 거리(Mahalanobis distance,MD)를 통해 음질 인덱스를 구축하고자 한다.

Keywords

References

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Cited by

  1. Psychoacoustical Study for Sound Quality Index of Steady State Noise of Refrigerators vol.26, pp.5, 2016, https://doi.org/10.5050/KSNVE.2016.26.5.536