Diesel Engine Noise Reduction Hardware for Vehicle Noise Control

1973 ◽  
Author(s):  
S. H. Jenkins ◽  
H. K. Kuehner
Keyword(s):  
Diesel Engine ◽  
Noise Reduction ◽  
Noise Control ◽  
Engine Noise ◽  
Vehicle Noise

Development of Natural Fibre Non-Woven Materials’ Application as Car Interiors for Noise Reduction

2011 ◽  
Vol 332-334 ◽  
pp. 1531-1534 ◽  
Author(s):  
Ming Ma ◽  
Yuan Bai ◽  
Xiao Ming Qian
Keyword(s):  
Noise Reduction ◽  
Reference Point ◽  
Sound Absorption ◽  
Noise Control ◽  
Natural Fibre ◽  
Noise Sources ◽  
Absorption Properties ◽  
Vehicle Noise ◽  
Nonwoven Materials ◽  
Potential Market

This document mainly introduces the evaluation of vehicle noise, noise sources and noise control. The development of fibers used for noise reduction materials is described as well. Besides, it analyzes the advantages and the necessities of the natural fibre nonwoven materials applied for the noise control, illustrates the present research status and the factors that introduces the sound absorption properties of the natural fibre nonwoven composites used for noise reduction. The paper also gives some reference point for advice to the development of automotive nonwoven materials. it shows that natural fibre nonwoven materials have a huge potential market and worthy for scholars to make a further study.

Paper 8: The Diesel Engine as a Source of Commercial Vehicle Noise

1969 ◽  
Vol 184 (16) ◽  
pp. 63-72 ◽  
Author(s):  
P. E. Waters ◽  
N. Lalor ◽  
T. Priede
Keyword(s):  
Diesel Engine ◽  
Empirical Formula ◽  
Engine Speed ◽  
Commercial Vehicle ◽  
Noise Source ◽  
The Other ◽  
Commercial Vehicles ◽  
Engine Noise ◽  
Vehicle Noise ◽  
Road Speed

The drive-past noise of diesel-engined commercial vehicles is controlled by engine speed rather than road speed. The principal noise source related to the power unit is the noise radiated by the engine structure, which has a level of 85–91 dBA during the ISO test. The combined intensity of all the other such sources is, at the most, equal to the noise radiated by the structure. It has been found that the parameters controlling engine noise are the bore, speed, and combustion systems. This has led to an empirical formula which predicts engine noise to within ±2 dBA.

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