This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Engine Sound Quality in Sub-Compact Economy Vehicles: A Comparative Case Study
Annotation ability available
Sector:
Language:
English
Abstract
A comparative study was undertaken to investigate engine noise in sub-compact vehicles under typical highway operating conditions.
Baseline acoustical testing was performed. Typical sound quality metrics indicated that passenger cabin noise levels and sound quality were similar among all vehicles tested. However, poorer subjective sound quality in a vehicle equipped with a 3-speed automatic transmission was related to a higher degree of perceived periodicity than in other models.
Further study of the 3-speed vehicle indicated that installing a 4-speed transmission would reduce noise more effectively than any substantial changes to the vehicle structure or engine mounting system. Damping or barrier treatments applied to the firewall or toe pan did not provide significant benefit.
Citation
Chapnik, B. and Howe, B., "Engine Sound Quality in Sub-Compact Economy Vehicles: A Comparative Case Study," SAE Technical Paper 971977, 1997, https://doi.org/10.4271/971977.Also In
References
- Zwicker, E. Fastl, H. Dallmayr, C. “BASIC-Program for calculating the loudness of sounds from their 1/3-oct band spectra according to ISO 532B” Acustica 55 1984 63
- Zwicker, E. Fastl, H. Psychoacoustics: Facts and Models Springer-Verlag Berlin 1990
- Fastl, H. “Roughness and Temporal Masking Patterns of Sinusoidally Amplitude Modulated Broadband Noise” Psychophysics and Physiology of Hearing Academic Press London 1977 403
- Aures, von W. “A Procedure for Calculating Auditory Roughness” Acustica 58 1985 268
- Genuit, K. Gierlich, H.W. “Investigation of the Correlation between Objective Noise Measurement and Subjective Classification” SAE Paper 891154
- Schiffbanker, H. Brandl, F.K. Thien, G.E. “Development and Application of an Evaluation Technique to Assess the Subjective Character of Engine Noise” SAE Paper 911081