Noise Cancellation Technique for Automotive Intake Noise Using A Manifold Bridging Technique

Colin Novak; Helen Ule; Robert Gaspar

doi:10.4271/2005-01-2368

2005-05-16

Noise Cancellation Technique for Automotive Intake Noise Using A Manifold Bridging Technique 2005-01-2368

Due to considerable efforts of automobile manufacturers to attenuate various noise sources within the passenger compartment, other sources, including induction noise have become more noticeable. The present study investigates the feasibility of using a non-conventional noise cancellation technique to improve the acoustic performance of an automotive induction system by using acoustic energy derived from the exhaust manifold as the dynamic noise source to cancel intake noise.

The validity of this technique was first investigated analytically using a computational engine simulation software program. Using these results, a physical model of the bridge was installed and tested on a motored engine. The realized attenuation of the intake noise was evaluated using conventional FFT analysis techniques as well as psychoacoustic metrics including loudness, sharpness, roughness and fluctuation strength.

While good correlation was found between the numerical and experimental results, additional work is recommended before implementation of a manifold bridge can be considered commercially viable.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Noise Cancellation Technique for Automotive Intake Noise Using A Manifold Bridging Technique 2005-01-2368

SAE MOBILUS