Knowles Corporation designs, manufactures, and sells micro-acoustic, audio processing, and precision device solutions for the mobile consumer electronics, communications, medtech, defense, automotive, and industrial markets worldwide. It operates in two segments, Audio and Precision Devices (PD). The Audio segment designs and manufactures audio products, including microphones and balanced armature speakers, audio processors, and software and algorithms used in applications that serve the mobile, ear, and Internet of Things markets. The PD segment designs and delivers capacitor products and radio frequency solutions that are used in applications, such as power supplies and medical implants, satellite communication, and radar systems, as well as our telecommunications infrastructure customers. The company also provides single layer electronic components to the telecommunication, fiber optics, and defense markets. It sells its products directly to original equipment manufacturers and to their contract manufacturers and suppliers, as well as through distributors. The company was founded in 1946 and is headquartered in Itasca, Illinois.