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Objective Evaluation of Diesel Combustion Noise in Vehicle Passenger Compartment

[+] Author Affiliations
Koo Tae Kang, Uhn Seob Byun

Hyundai Motor Company

Paper No. IMECE2006-14271, pp. 55-60; 6 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Noise Control and Acoustics
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-4776-4 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


The combustion noise of diesel engine during run up and idle condition makes unpleasant interior noise in passenger car whose market share is increasing nowadays. There were few studies to quantify the unpleasantness of combustion noise. We tried to introduce an objective metrics which matches well with subjective ratings of combustion noise. To get the objective metrics, the combustion noise signal was analyzed by many different methods based on the human hearing sense. In the end, we found out that the modulation amplitudes of each frequency band match well with the unpleasant characteristics of combustion noise. Then, an objective index was developed from the combination of modulation amplitudes on the basis of the human hearing sense. The index was shown to be in good correlations with subjective ratings in general.

Copyright © 2006 by ASME



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