Patent ID: 8953831
Filing Date: 2015-02-10
Classification: G10K,H04R

Abstract:
1. An acoustic horn, comprising: at least four wall sections, defining a passageway, the passageway comprising a throat, for acoustically coupling the interior of the passageway with an acoustic driver and a mouth, through which acoustic energy is radiated from the passageway to the environment; wherein the cross-sectional area of the mouth is at least ten times the cross sectional area of the throat; wherein the wall sections are dimensioned so that at least one wall section which is a wide wall section; has a dimension at the mouth at least ten times a dimension at the mouth of a second wall section which is a narrow wall section; the acoustic horn further comprising a pattern of acoustically resistive elements coupling the interior of the passageway with the environment, the pattern extending lengthwise along at least one of the narrow wall sections.