Let's understand the principle of horn loudspeaker

2023 01/29

The horn loudspeaker originated from the phonograph and consists of a vibration system (tweeter) and a trumpet. The principle is that the diaphragm pushes the air at the bottom of the horn to work. Because of the high sound resistance, the efficiency is very high. However, the shape and length of the PA loudspeaker will affect the timbre, so it is not easy to replay at low frequencies. In fact, ordinary dynamic speakers are equipped with horn speakers, a kind of speaker speakers. It is mainly composed of an excitation part and a horn part. The excitation part is composed of magnet, voice coil and diaphragm. The excitation principle is the same as that of ordinary electric speakers.


Operating principle of horn speaker:


When the coil in the loudspeaker is energized, its coil will generate a magnetic field. Under the interaction with the magnetic field of the magnet, the coil will vibrate, and the vibration will make a sound, which is the force of the energized conductor in the magnetic field. When the AC audio current passes through the coil (voice coil) of the speaker, the corresponding magnetic field will be generated in the voice coil. The magnetic field interacts with the magnetic field generated by the permanent magnet on the loudspeaker. So this force makes the voice coil vibrate with the audio current in the magnetic field of the permanent magnet of the speaker itself. The diaphragm of the speaker is connected with the voice coil, so the diaphragm also vibrates. Vibration produces sound with the same waveform as the original audio signal.



The horn speaker has the advantages of strong directivity, large power and high efficiency, so it is widely used in venues, fields, vast fields and other fields. Professional high frequency speakers have the characteristics of good sound quality and good frequency response, and are mainly used in places with high requirements such as theaters.