Date of Award
Mechanical, Automotive, and Materials Engineering
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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.
Bowie, Michael, "Transmission loss and psychoacoustics of magnesium panels for automotive dash panel applications" (2011). Electronic Theses and Dissertations. 8269.