Speakers, loudspeakers, or speaker systems are output devices through which electrical signals come out as sound. It is in fact an electromechanical transducer, which is very much responsible for the quality of the sound that comes out. Loudspeaker is a general term. It may include a set of speakers, a single device or a set of drivers, or piezoelectric speakers. Loudspeakers are variable instruments and are available in a lot of sizes, shapes and qualities.
The accuracy of a loudspeaker is one of the primary concerns we look for before selecting one. Some of the popular type of loudspeakers and drivers include woofers, sub woofers, horn loudspeakers, piezoelectric speakers, electrostatic loudspeakers, ribbon and planner magnetic loudspeakers, bending wave loudspeakers, flat panel loudspeakers, distributed mode loudspeakers, plasma arc speakers, and digital speakers.

The performance of a loudspeaker is measured on the basis of its ability to reproduce a signal without distorting or warping. When compared to other audio equipment, a loudspeaker lacks a lot in this. The frequency response of the amplifiers may vary less than 0.1 dB whereas for loudspeakers it is around +3 dB and -3 dB of ideal linearity.
Piezoelectric speakers are the ones which are frequently used as beepers […]

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