Beats HeadPhone M-789

Description

Headphones are a pair of small loudspeaker drivers worn on or around the head over a user’s ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby to hear. Headphones are also known as earphones or, colloquially, cans. Circumaural (around the ear) and supra-aural (over the ear) headphones use a band over the top of the head to hold the drivers in place. A third type, known as earbuds or earpieces, consists of individual units that plug into the user’s ear canal; within that category, cordless air buds using wireless technology. A fourth type is bone conduction headphones, which typically wrap around the back of the head and rest in front of the ear canal, leaving the ear canal open.

Headphones connect to a signal source such as an audio amplifier, radio, CD player, portable media player, mobile phone, video game console, or electronic musical instrument, either directly using a cord, or using wireless technology such as Bluetooth, DECT or FM radio.

The first headphones were developed in the late 19th century for use by switchboard operators, to keep their hands free. Initially, the audio quality was mediocre and initially designed for telecommunication use. Since then, headphones have evolved to become high-fidelity devices capable of reproducing a wide range of sounds with great accuracy and clarity. They are now widely used for listening to music, watching movies, playing video games, and making phone calls.