- 
  
  First headphones were invented by Nathaniel Baldwin.
- 
  
  The first radio headphones started being manufactured.
- 
  
  The first dynamic headphones were invented by a german company called Beyerdynamic.
- 
  
  Early HeadphonesIn consisted of moving iron transducers. In the 1950's, moving iron headphones were replaced by stereo headphones.
- 
  
  John C. Koss produced the first stereo headphones in 1958.
- 
  
  In the 1960's, Iron moving transducers where replaced with plastic cones.
- 
  
  With the release of the Sony Walkman, headphones started to become smaller and more compact, so they could be easier to carry around with the Walkman.
- 
  
  In the 1990's earbuds came out, which revolutionized the headphone undustry. Having the sound go directly into your ear increased the quality of the sound.