Patent ID: 6519348
Filing Date: 2003-02-11
Classification: H04R

Abstract:
A speaker apparatus comprising a speaker with a horn,said horn has a shape in which: a sound input port is attached to a vibrating surface of said speaker, and a sound output port for outputting sound inputted to the sound input port is smaller in area than the sound input port; the length from said sound input port to said sound output port is not more than 370 mm; when representing the area of the opening of said sound input port as A, the area of the opening of said sound output port as B, the length of said horn as L, a distance from said sound input port as X, and an arbitrary integer of not less than 1 as C, the area Y of the vertical section, of said horn, being parallel to a plane of said sound input port at the distance X can be expressed by the following equation; Y=(Aâˆ’B)Ã—(Lâˆ’X)c/Lc+B; and â€ƒsaid sound output port is formed in a position where a center axis of the sound radiated from said speaker does not impinge against an inner wall of said horn.