Beeper Horn
Conventional speaker design
This is the most old speakers used and incorporated for the first time players of the recording cylinder. They used a waveguide to increase the directivity of the speakers and spread the high pressure at one end of the horn to a larger area at the other end of the horn, which increases the sensitivity of the speaker. The design of the speakers as the size of the throat, mouth diameter and length of the horns must be carefully selected for maximum frequency response.
Piezoelectric Speakers:
These speakers are usually incorporated as beepers in watches and as speakers acute in economic systems such as radio and computer speakers. Some of the advantages of piezoelectric speakers over conventional horn speaker are: can withstand high frequencies, and its electrical goods allowed to work without crossover. Some of the disadvantages of piezoelectric speakers are: the possibility of amplifiers to oscillate and damage itself when capacitive loads such as piezoelectric speakers are present, and its frequency response is much lower in comparison with other speakers.
Electrostatic speakers:
These speakers are driven by high voltage electric field. It consists of a thin membrane, charged and units of the membrane electric field. They have some disadvantages such as low efficiency, and attract dust particles from its membrane has static.
Ribbon and planar magnetic speakers:
He magnetic tape consists of a thin metal ribbon suspended in a magnetic field. When a signal electricity is passed through the tape moves the tape to make the sound. They have the advantage of good frequency response for high frequencies, but are extremely fragile and are expensive to build because it requires a very powerful magnet.
Planar magnetic speakers are formed by a coil speakers and an elastic membrane. When current passes through the coil, the coil's magnetic field interacts with the field magnets present around the membrane to vibrate the membrane.
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