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Edge of vibration board
What is the edge of the speaker?
The edge connects the circumference part of the vibration board to the frame part. It is necessary to be able to follow to the movement without always maintaining the vibration board at a correct position, and disturbing the movement of the vibration board.
Another role of the edge is to intercept the sound in the back of the vibration board. A present speaker enclosure is a factor important because the one using the exhaust back pressure is most.
The kind of the edge is roughly divided.
There is a fault. A free edge does the one (In a word, the material besides the vibration board can be used) that processes only the edge by another material and bonded while [fikkusudoejji] is assumption of the extension of the material of the vibration board (In a word, the material of the vibration board and the material of the edge are the same) an edge. A free edge is a main current now.
