Telephone invent with two canes and a piece of wire. And technologists made them better and better day by day. Now you can see a tiny part of phones which called headphone. Every day this technology has been developed and we see very beautiful, attractive and very tiny headphones in market.The particular needs of the listener determine the choice of headphone. The need for portability indicates smaller, lighter headphones but can mean a compromise in fidelity. Headphones used as part of a home hi-fi do not have the same design constraints and can be larger and heavier. Generally, headphone form factors can be divided into four separate categories: circumaural, supra-aural, earbud, and in-ear.Although modern headphones have been particularly widely sold and used for listening to stereo recordings since the release of the Walkman, there is subjective debate regarding the nature of their reproduction of stereo sound.