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By Marek Pawelczyk, Stanislaw Wrona. Marek Pawelczyk is currently a professor at the Silesian University of Technology, Gliwice, Poland. He is president of the International Institute of Acoustics and Vibration, and author of over 200 papers, 3 books and 8 patent applications.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.