Audio classification.Audio equipment for video conference room

　　1. Closed enclosure (Closed Enclosure) is the simplest speaker system. In 1923, Frederick proposed that it is composed of speaker units installed in a fully sealed box, which can radiate the forward and backward radiation of the speaker. Sound waves are completely isolated, but due to the closed box...

　　2. Bass reflex speakers, also known as inverted speakers, were invented by Thuras in 1930. In its load, there is a sound outlet opening on a panel of the box. There are various opening positions and shapes, but most of them are in A sound conduit is also installed in the hole.

　　3. Acoustic resistance speaker The acoustic resistance speaker is essentially a deformation of the inverted speaker. It fills the sound-absorbing material or structure in the sound outlet conduit, and acts as a semi-closed box to control and guide it, so that it can be buffered and Lowers the vibration frequency to broaden the bass reproduction band.

　　4. Transmission line speaker Transmission line speaker is named after the transmission line of classical electrical theory. Behind the speaker, there is a sound duct made of sound-absorbing wall plate, and its length is required.

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