Using Spherical Beamforming to Evaluate Wind Noise Paths General Motors do Brasil

Format:

Conference/Event

Author/Creator:

Massarotti, Massarotti, author.

Contributor:

Calçada, Márcio

Ribeiro, Yuri

Conference Name:

SAE Brasil International Noise and Vibration Colloquium 2014 (2014-11-04 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2014

Summary:

AbstractMicrophone 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

Notes:

Vendor supplied data

Publisher Number:

2014-36-0791

Access Restriction:

Restricted for use by site license