Audex, Inc. (Audex), a privately-held medical device manufacturing company is principally engaged in the design, manufacture and marketing of progressive and innovative assistive listening device. The company develops infrared and magnetic induction wireless assistive listening devices for hearing impaired people; and amplified cordless and portable phones. In addition, it also manufactures and markets the SounDirector, a hardwired assistive listening device that is popular with speech and hearing clinics, courts, schools, and speech pathologists. The company has its operation spread across the US. Audex was formerly known as Audiometrics, Inc. The company is headquartered at Longview in Texas, the US.