A speaker horn, a loudspeaker or a loudspeaker element that uses an acoustic horn to increase and build the efficiency of the driving element. The right form consists of the compression driver that produces sound waves with the help of a small metal diaphragm which is vibrated by an electromagnet, that is attached to the horn, a flaring duct to throw the sound waves to the open air.
Another type is the woofer driver which is mounted to a loudspeaker enclosure which is divided by the internal parts to form a zigzag flaring duct that functions as the horn, this is called the folded horn speaker.
The horn is though as the “acoustic transformer” which provides the impedance matching the relatively dense diaphragm material and less-dense air. This results in greater acoustic output power from the driver.
The narrower part of the horn near to the driver is the “throat” and the larger part farthest is the “mouth”. Angular coverage of the horn is determined by the shape and the flare of the mouth of the horn. The major problem of the loudspeaker horn is the radiation pattern that varies the frequency; the high-frequency sound emits in narrow beams with poor off-axis performance.
The main advantage of the loudspeaker horn is that they are more efficient; they can produce 3 times more power than the cone-shaped speaker from the given amplifier output and depending on the ability of the driver to work well.
The horn is manufactured by the speaker Horn manufacturers to convert large pressure variations with small displacements area to a low-pressure variation to large displacements. This does it through the gradual exponential increase of the cross-sectional area of the throat does not let the air presenting the high acoustic impedance to the driver.
it allows the driver to build the high pressure for the provided displacement. The sound waves at the throat are high-pressure and low displacement. The tapered shape of the horn lets the sound waves to decompress and increase the displacement until it reaches the mouth where it is at low-pressure but of large displacement.
