ximena carolina

The headphones use initiated from telephony and radio. Weak electrical signals of the early instruments (electronic yet) required a customized amplification to the field of telephony.

A company Beyerdynamic officially ascribed the invention, in the late 1930s, and as the first headset company to sell to the general public: DT48 model in 1937.1

Its use mass events from the emergence of personal audio systems: portable radios and portable cassette, later the phenomenon increased with the use of the CD player, digital audio player, and personal computer.

With the advancement in electronics has incorporated a radio receiver AM / FM, and other capabilities acquired as wireless communication (via infrared, Bluetooth, or Wi-Fi) to receive signals from a base unit.

information taken : http://es.wikipedia.org/wiki/Auriculares

Started Headphones do use from telephony and radio. the headphones are devices where ever listen to music but we wondered who the invention and which was the first to go to fashion after the radio. beyerdinamic company unveils its invention in 1930 and throughout its history will modernize and remain as we know them
we must consider if we exaggerate its use tend to damage our hearing