Date of Award

2011

Publication Type

Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

First Advisor

Colin Novak

Keywords

Applied sciences

Rights

info:eu-repo/semantics/openAccess

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Abstract

Many drivers are subjected to excessive noise from the powertrain during normal vehicle operation in everyday life. Currently, steel and aluminum are being exclusively used with an automotive underpad backing and plastic covering in many automobiles for the dash panel. Many automotive companies are now trying to produce light-weight vehicles to lower emissions and increase fuel efficiency. A proposed method currently being considered is to replace steel or aluminum with magnesium for the dash panel. One particular area of performance that needs to be evaluated before mass production of the dash panels is the acoustic properties of the materials. A particular aspect that is evaluated is transmission loss. This thesis discusses the impedance tube device and methods used to measure the transmission loss of materials, the importance of this property, as well as the evaluation of absorption coefficients of underpads and psychoacoustic parameters.

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