Methods for an Acceptable Traffic Noise Level Design

This article reports on a study of road noise disturbance, which is the noise noticed by the occupants of a vehicle and which is created primarily by a combination of rough roads and the vehicle’s exhaust noises. The authors applied a systematic approach for the sound quality estimation of the physical properties of various noise sources and structural vibroacoustic car properties. The information obtained can then be used as an integrated parameter in car design for the purpose of vehicle noise reduction. Simulation of the most important characteristics of listening impressions was performed by signal analysis, together with the factors of loudness, sharpness, and roughness as essential quantities. Structural analysis was performed as an acoustic modal analysis on the rear part and the car interior with the quantitative analysis of sport and luxury car sounds. The possibility of active noise control was considered. The authors give examples for an application of psychoacoustic tools for car sound quality design. The authors conclude that levels of weight values, particularly if they are used as an indicator, are insufficient for the estimation of audible variations in sound quality. In practice, not only qualitative but also quantitative correlation is necessary between subjective evaluation and physical measuring. The results indicate that for the impulsive sounds of the car interior, the psychoacoustic quantities of loudness, sharpness, pitch, and roughness should be taken into consideration. The noise control measurements may be optimized by means of a simulation system with the capability of the real time filtering of the original sound.

  • Availability:
  • Authors:
    • Sviben, Zlatko
    • Tos, Zdravko
    • Borkovic, Miroslav
  • Publication Date: 2004

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 207-210
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01002939
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 17 2005 10:03PM