Patent ID: 7845462

Claim:
In a loudspeaker horn for operation in a middle to high frequency range, an axially straight pathway horn body having a throat arranged rearwardly and employing a terminal expansion rate resulting in the horizontal side horn walls terminating in a front plane substantially perpendicular to the horn pathway axis, and partially forming a mouth therewith, said horn mouth being proportioned primarily for horizontal dispersion, and further comprising a modular horn mouth rearward extension, said extension consisting of at least two outer side baffles engaged in sealed relation with at least two opposite and outer sides of said mouth and adapted to be substantially equal in at least one dimension relative to the corresponding terminal dimension of said horn mouth sides, and reciprocally arranged to splay rearwardly on at least two opposite sides of said horn mouth, said side baffles each comprising an angled surface that progresses without acoustically significant interruption from said front plane of said horn mouth and terminating rearwardly in a parallel spaced plane from said front plane, wherein said angled surfaces are further each adapted to form a smooth and continuous outwardly disposed facing which progresses from the frontal plane of the horn terminus by which sound waves propagating from said mouth traveling perpendicular to said axial pathway are substantially prevented from the effects of diffractive disbursement generally associated with acoustically significant interruptive edges, said edges thereof being thereby disposed rearwardly of said horn mouth, and each said outer side baffle further providing a rearward and upper and lower attachment surface, means for completing said horn body and said horn mouth, and means for fixing the position and attitude of said horn body axial pathway in relation to a horizontal surface.