Using Spherical Beamforming to Evaluate Wind Noise Paths

2014-36-0791

11/04/2014

Event
SAE Brasil International Noise and Vibration Colloquium 2014
Authors Abstract
Content
Microphone array based techniques have a growing range of applications in the vehicle development process. This paper evaluates the use of Spherical Beamforming (SB) to investigate the transmission of wind-generated noise into the passenger cabin, as one of the alternative ways to perform in-vehicle troubleshooting and design optimization. On track measurements at dominant wind noise conditions are taken with the spherical microphone array positioned at the front passenger head location. Experimental diligence and careful processing necessary to enable concise conclusions are briefly described. The application of Spherical Harmonics Angularly Resolved Pressure (SHARP) and the Filter-And-Sum (FAS) algorithms is compared. Data analysis variables, run-to-run repeatability and system capability to identify design modifications are studied. It is demonstrated that the Spherical Beamforming is a powerful tool to visualize dominant noise paths in vehicle, providing valuable information for the wind noise control at the transmission paths rather than using the standard single microphone operational data at the observer location.
Meta TagsDetails
DOI
https://doi.org/10.4271/2014-36-0791
Pages
9
Citation
Massarotti, M., Ribeiro, Y., and Calçada, M., "Using Spherical Beamforming to Evaluate Wind Noise Paths," SAE Technical Paper 2014-36-0791, 2014, https://doi.org/10.4271/2014-36-0791.
Additional Details
Publisher
Published
Nov 4, 2014
Product Code
2014-36-0791
Content Type
Technical Paper
Language
English