Computer Speakers

Speakers

Translates electronic signals consisting of audio information from the computer into sounds that user can hear and understand it.
Widely used audio output devices are speakers and headphones.
These audio-output devices are connected to a sound card in the system unit to capture and playback recorded sounds.
Used to play songs, movies, vocalized translation form one language to another, communicating over the networks etc.

It consists of diaphragm of coned shape which is made up of paper, plastic or metallic material, a magnet, voice coil made up of coil of wire wrapped on high conductivity metal, spider for lower suspension, surrounding arm for upper suspension, a dust cap to cover the bottom part of diaphragm cone and a basket to hold all the parts together.
When electric current is passed through the voice coil, it works as a electromagnet producing magnetic field around the coil with a polar orientation.
This makes voice coil to attract or repel to the permanent magnet depending upon the north or south end polar orientation.
Polar orientation can be altered by reversing the flow of current and this is achieved by using amplifier, where it constantly switches the electrical signal from positive to negative charge.
As voice call is attached to diaphragm, diaphragm also moves with the coil creating waves of air pressure with different frequency and amplitude.
These waves of air pressure are heard as a sound from the speaker.