Patent ID: 7631724

Claim:
A sound-wave path-length correcting structure for a speaker system, comprising: a sound source for outputting sound waves; and a horn having a sound-wave path-length correcting throat portion for correcting a sound-wave path-length of a sound wave input from an inlet opening thereof connected to the sound source in a sound path and emitting the sound wave from a rectangular outlet opening, and a loudspeaker horn portion for amplifying the sound wave emitted from the outlet opening, wherein: the sound path is defined by a first side surface with a concave curve and a second side surface with a convex curve which are positioned in the longitudinal direction of the outlet opening and face each other with a space, and a third side surface and a fourth side surface which are positioned in the short direction of the outlet opening and face each other with a space; the third side surface and the fourth side surface are formed such that the surfaces gradually widen towards the outside as the surfaces advance from the inlet opening to the outlet opening; and in the sound path, a center axis connecting a center of the inlet opening and a center of the outlet opening is curved along the first side surface and the second side surface.