Patent ID: 7275621

Claim:
A horn, comprising: a substantially flat coupling flange defining a coupling flange plane; a substantially planar mouth defining a mouth plane; an elongated duct having a transducer-connecting end and a mouth-connecting end and extending between the coupling flange and the mouth; a transducer for generating a sonic output operationally connected to the coupling flange; and a major axis substantially perpendicular to the coupling flange plane extending through the elongated duct; wherein the coupling flange plane and the mouth plane are nonparallel and define a horn angle; wherein the major axis is substantially parallel to a skew angle of the horn; wherein the major axis connects the coupling flange and the mouth; and wherein the elongated duct is characterized by a substantially steadily increasing sectional area along the major axis from the transducer-connecting end to the mouth connecting end such that sound waves generated by said transducer propagate unreflected down the elongated duct.