Technically we can define speaker, as a component which converts the electrical signals into the equivalent air vibrations to  make audible sound. To understand the working of a speaker, we first need to understand the concept of sound. A sound is nothing but vibrations in air particles.  When a sound source generates a sound, it generally makes a vibration in its surrounding air particles which finally reaches to our eardrum. Sound is characterized by the parameters like frequency, speed, fluctuation, pressure, etc. The speaker works on the same concept. The speaker works on the same concept. It produces vibrations in air particles in order to generate a sound. Let’s have a look to its outside formation