Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Study on the Sound Quality Evaluation Method for the Vehicle Diesel Engine Noise

승용차 디젤 엔진 소음에 대한 음질 평가 기법 연구

  • 권요섭 (국민대학교 자동차공학전문대학원) ;
  • 김찬묵 (국민대학교 자동차공학전문대학원) ;
  • 김기창 (현대자동차 차량해석팀) ;
  • 김진택 (전북대학교 기계항공시스템공학부)
  • Received : 2011.04.15
  • Accepted : 2011.09.06
  • Published : 2011.10.20
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Abstract

The brand sound of vehicle diesel engine is recently one of the important advantage strategies in the automotive company. Because various noise components masked under high frequency level can be audible in quieter driving situation. Many researches have been carried out for subjective and objective assessments on vehicle sounds and noises. In particular, the interior sound quality has been one of research fields that can give high quality feature to vehicle products. Vehicle interior noise above 500 Hz is usually controlled by sound package parts. The materials and geometries of sound package parts directly affect on this high frequency noise. This paper describes the sound quality evaluation method for the vehicle diesel engine noise to establish objective criteria for sound quality assessment. Considering the sensitivity of human hearing to impulsive sounds such as diesel noise, the human auditory mechanism was simulated by introducing temporal masking in the time domain. Furthermore, each of the human auditory organs was simulated by computer codes, providing reasonable analytical explanations of typical human hearing responses to diesel noise. This method finally provides the sound quality index of vehicle diesel engine noise that includes high frequency intermittent offensive sounds caused by impacting excitations of combustion and piston slap.

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References

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