Since 1946 Knowles has helped designers find more ways to put better technology to work for their customers. Knowles is a market leader and global supplier of advanced micro-acoustic, specialty components, and human interface solutions in the mobile communications, consumer electronics, medical technology, and other industrial end markets. Knowles' deep experience and rigorous testing delivers consistently dependable and precise products including speakers and microphones for hearing health products, premium music earphones, communications headsets, and industrial acoustic applications. Knowles MEMS (micro-electro-mechanical systems) microphones and micro-speakers are widely used in smartphones, tablets, notebooks, and other portable devices. Headquartered in Itasca, Illinois, and publicly traded on the NYSE under the symbol "KN", Knowles has more than 10,000 employees in 37 locations worldwide includes design centers in Europe, Asia and North America. All manufacturing facilities are ISO-9001 certified, with some additionally certified to ISO-14001 or OHSAS-18001. The Knowles Quality Management System ensures design, integrity, efficient manufacturing and the cost effective on-time delivery of their products.