Telex Communications, originally Telex Corporation, was a Burnsville, Minnesota

Burnsville, Minnesota

Burnsville is a city south of downtown Minneapolis in Dakota County in the U.S. state of Minnesota. The city lies on the south bank of the Minnesota River, upstream from the confluence with the Mississippi River...

-based manufacturer of hearing aid

Hearing aid

A hearing aid is an electroacoustic device which typically fits in or behind the wearer's ear, and is designed to amplify and modulate sound for the wearer. Earlier devices, known as "ear trumpets" or "ear horns", were passive funnel-like amplification cones designed to gather sound energy and...

s and audio equipment. Founded in 1936 as a maker of hearing aids, it entered the computer peripherals businesses in the 1960s. It became Telex Communications, a subsidiary of Telex Corp in the 1970s. It was acquired by Memorex

Memorex

Memorex began as a computer tape producer and expanded to become a major IBM plug compatible peripheral supplier. It is now a consumer electronics brand of Imation specializing in disk recordable media for CD and DVD drives, flash memory, computer accessories and other electronics.Established in...

 in 1988, which renamed itself Memorex Telex NV. It was subsequently spun out as an independent company in 1989. In February 1998 it merged with Electro-Voice

Electro-Voice

Electro-Voice is a manufacturer of audio equipment, including microphones, amplifiers, and loudspeakers. A subdivision of Telex Communications Inc., Electro-Voice markets its products for use in small or large concert venues, broadcasting, houses of worship, and in retail situations.-History:On...

.

In August 2006, the company was acquired by Germany's Bosch Group

Robert Bosch GmbH

Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...

for $420 million, becoming a business unit under the name "Bosch Communications Systems".