Improved acoustic attenuation materials and applications are provided. An improved acoustic attenuation material may include a woven layer of fibers made of porous polymers, such as porous polytetrafluoroethylene (PTFE), that include interstitial space. An improved acoustic attenuation material may include...http://www.google.es/patents/US7956514?utm_source=gb-gplus-sharePatente US7956514 - Ultrasonic attenuation materials
