ABSTRACT
With the improvement of industry, many new products of development create many different voices and aim at the transmitting and receiving with voice compared to the different demand. For example, the headphones are usually used with games or movies. These need multiple upgrading in sound effect. With the prevalent music festivals in the world, the sound effect is enable to present perfectly by ideal speakers. The demand for the kind of products enlarges. General headphones are restricted with the size of speakers and portable ones, so there are seldom good qualities of voice.
