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                | 4.  | 
                
                  
                  Use of Nonwovens as Noise Control Elements
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                  Scientific article about the identification of a functional relationship for the variation in porosity through the thickness of a nonwoven sound absorbent medium. Authors: Yakir Shoshani and Yakov Yakubov.
                   
                  
                  
                   
                  
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                | 5.  | 
                
                  
                  Nonwovens Science and Technology
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                  Comprehensive introduction to the nonwovens industry, originally created by Prof. Kermit Duckett and students at the University of Tennessee, and currently maintained by Prof. Larry Wadworth. Extensive descriptions of fibers and materials, web formation technologies, finishing and bonding techniques, nonwoven geotextiles, and testing methods.
                   
                  
                  
                   
                  
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