Patent ID: 7299893
Filing Date: 2007-11-27
Classification: H04R

Abstract:
1. A loudspeaker horn for use with aligned and relatively widely spaced acoustic power sources and having a propagation axis, said loudspeaker horn comprising a relatively short throat end having a transversely elongated throat for receiving acoustic power from aligned acoustic power sources mounted to said throat end, said elongated throat having a top, a bottom, and elongated sides defining a long dimension, a flared section extending from said throat end, said flared section having end walls extending from the top and bottom of said throat and flared side walls extending from the elongated sides of said throat, said flared section further having a mouth end through which acoustic power received at the throat end of the loudspeaker horn is propagated into space in a characteristic distribution pattern, and grating lobe mitigation fins disposed in said flared section between the end walls thereof, said grating lobe mitigation fins being disposed in planes substantially perpendicular to the long dimension of said throat and substantially parallel to the horn's propagation axis, and extending for a substantial distance from the throat of the horn toward the mouth end of said flared section for mitigating grating lobes produced by aligned acoustic power sources at the throat end of the horn.