The Study on Influence of High Frequency Noise on Sound Quality for Generator

Abstract:

As cars become quieter the sound quality of components becomes more critical in the customer perception of car quality. This requires a need of new evaluation method for the specification of component sounds. Considering that high frequency noise plays an important roll for internal noise, the noise signals in the range from 7000Hz to 8000Hz are specially emphasized. Then the acoustic evaluation parameters, such as Sound Pressure Level, Sharpness and Steadiness have been evaluated. Judged from experiences and measuring results, an abnormal noise comes from Generator, through the exchange of Generator, Sound Pressure Level and sharpness were greatly improved. At the same time, subjective evaluation also indicated that there was no complaint any more in passenger compartment. Low Sound Pressure Level, sharpness can lead to perceived high product quality.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 74-79
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.74
• Online since: September 2011
• Authors: Zha Gen Ma, Xue Ying Xu, Guo Hua Han
• Keywords: High Frequency Noise, Sharpness, Sound Pressure Level, Sound Quality

References

[1] J.N. Penfold: SAE Technical Papers, (1997) 972017.

[2] N. Arne and S. Anna: Applied Acoustics, Vol. 70 (2009) No.6, p.813.

[3] E. Zwicker and H.Fastl: Psychoacoustics-Facts and Models 2nd ed. (Springer Verlag, Germany 1999).

[4] G.Von Bismarck: Acustica, Vol. 30 (1974), p.159.

[5] W.Aures: Acustica;Vol. 59 (1985),p.130. (In German)