Source Noise Isolation During Electric Vehicle Pass-By Noise Testing Using Multiple Coherence

Authors

Jennifer Bastiaan, Kettering UniversityFollow
Manuj Dindgur
Edward Green

Document Type

Conference Proceeding

Publication Date

4-14-2020

Publication Title

SAE Technical Papers

Conference Name

WCX SAE World Congress Experience

Abstract

Due to the nearly silent operation of an electric motor, it is difficult for pedestrians to detect an approaching electric vehicle. To address this safety concern, the National Highway Traffic Safety Administration issued the Federal Motor Vehicle Safety Standard (FMVSS) No. 141, “Minimum Sound Requirements for Hybrid and Electric Vehicles”. This FMVSS 141 standard requires the measurement of electric vehicle noise according to certain test protocols; however, performing these tests can be difficult since inconsistent results can occur in the presence of transient background noise. Methods to isolate background noise during static sound measurements have already been established, though these methods are not directly applicable to a pass-by noise test where neither the background noise nor the vehicle itself as it travels past the microphone produce stationary sound signals. In this work, a 2017 Chevrolet Bolt electric vehicle is used for physical testing of pass-by noise at the Kettering University GM Mobility Research Center (GMMRC), an inner-city proving ground in Flint, Michigan. Sound signal processing is performed using a multiple coherence approach including discrete time intervals to isolate background noise from the noise of the electric vehicle. The suitability of both the signal processing method and the MRC facility for pass-by noise testing of electric vehicles is investigated and presented.

Comments

DOI: 10.4271/2020-01-1268

ISSN: 0148-7191 e-ISSN: 2688-3627 SAE Technical Paper 2020-01-1268

Rights Statement

© 2020 SAE International. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE International.

Recommended Citation

Bastiaan, Jennifer; Dindgur, Manuj; and Green, Edward, "Source Noise Isolation During Electric Vehicle Pass-By Noise Testing Using Multiple Coherence" (2020). Mechanical Engineering Presentations And Conference Materials. 142.
https://digitalcommons.kettering.edu/mech_eng_conference/142