Browse Publications Technical Papers 2008-36-0509
2008-03-30

Comparison of Time and Frequency Domain Source Path Contribution Analysis for Engine Noise Using a Noise and Vibration Engine Simulator 2008-36-0509

In this paper a time-domain version of source-path-contribution analysis is investigated using a controllable source, an engine noise and vibration simulator installed into a trimmed vehicle, and compared to the results obtained using a more traditional frequency-domain source-path-contribution analysis. Both airborne and structure-borne inputs are investigated and the matrix method is used to calculate source contributions as sounds at a listeners' position inside the cabin. Operating data from a simulated run-up/run-down and sets of transfer functions (FRFs) are firstly used to estimate the strength of some defined point sources, acoustically and mechanically. Secondly the operating source strengths are combined with acoustic or vibro-acoustic FRFs to predict contributions at a receiver. In this work it is attempted to make the airborne and structure-borne models as simple as possible, and predicted contributions are validated against actual measured data.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 18% 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

Driveline NVH Modeling Applying a Multi-subsystem Spectral-based Substructuring Approach

2005-01-2300

View Details

TECHNICAL PAPER

A Topographically Structural Optimization Methodology for Improving Noise Radiation in Transaxles

2007-01-2287

View Details

TECHNICAL PAPER

Virtual Transfer Path Analysis at Daimler Trucks

2009-01-2243

View Details

X