Browse Publications Technical Papers 2009-36-0292
2009-10-06

Improvement of Sound Absorption Material for Diesel Engine Cover 2009-36-0292

In this work the acoustic treatment of an engine cover was designed based on airflow resistance and sound absorption data. Single layer and multilayer treatments with measured airflow resistance were employed to reduce noise radiated by a diesel engine. The analysis was focused in the region in which the “knocking” noise is particularly noticeable. The methodology of acoustic design was confirmed by in-vehicle noise measurements. The application of a sound absorption treatment with a controlled specific airflow resistance provided the highest noise attenuation. An improvement in the sound quality was also achieved due to a reduction in the “knocking” noise.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Powertrain Noise & Sound Quality Refinement for New Generation Common Rail Engines

2010-01-1414

View Details

TECHNICAL PAPER

Progress on Active Exhaust Silencers for Gasoline Engines

2011-01-1639

View Details

TECHNICAL PAPER

Human Auditory Models and Sound Quality Evaluation Method for Diesel Noise

2007-01-2219

View Details

X