A white paper from E-A-R Specialty Composites describes how passive acoustical systems can be used to improve automotive designs. The free eight-page paper, "The Four-Fold Method of Noise and Vibration Control," describes tools used for noise and vibration control: damping, isolation, absorption, and barrier materials.
George Gabuzda, senior director of E-A-R Specialty Composites, commented, "Whether automotive engineers are attempting to retrofit noise and vibration controls into existing products, or considering new product designs, it pays to have a better handle on basic principles that affect choices of materials for noise or vibration controls." www.earsc.com/pdfs/engineering/4foldWP.pdf.