Beyerdynamic GmbH & Co. KG (stylized as beyerdynamic) is a German manufacturer of microphones, headphones, wireless audio systems, and conference systems. Headquartered in Heilbronn, Germany, Beyerdynamic has been family-owned since its founding in 1924.

In the 1920s in Berlin, founder Eugen Beyer believed that cinema presented a new opportunity in communication media. The first products he produced were loudspeakers for film palaces in 1924. At the end of the 1930s, Beyer developed the first pair of dynamic headphones, the DT 48. World War II temporarily froze production; however, in 1948, Beyerdynamic sought new beginnings in Heilbronn. The "Stielhörer" DT 49 became a popular item of "Plattenbars" (record-bars) in the 1950s.

Beyerdynamic developed the highly directional ribbon microphone Beyerdynamic M 160 model in 1957, along with the figure-8 pattern M 130. These microphones contained dual ribbon aluminum elements suspended between neodymium magnets. The M 160 went on to become a classic recording studio microphone, still in production after more than six decades. The "transistophone", the company's first wireless microphone, went into production in 1962. The Beatles' 1966 German tour used the E-1000 microphone. Elton John, ABBA, and Stevie Wonder all sang into sound transformers produced by Beyerdynamic. In 1985, Beyerdynamic acquired its then-North American distributor, Burns Audiotronics, which became its North American subsidiary. Today Beyerdynamic, Inc. have their own office headquartered in Farmingdale, New York.