Patent ID: 8113906

Claim:
A noisemaker assembly, comprising: an annular horn body having a top surface, a bottom surface, an inner wall, an outer wall and a groove disposed in between said inner wall and said outer wall, wherein said groove is open at said top surface of said annular horn body; a membrane covering said top surface of said annular horn body; a tubular mouthpiece that defines a conduit, wherein said tubular mouthpiece extends from said annular horn body and wherein said conduit communicates with said groove; a housing that defines an internal resonance chamber, said housing having internal ribs, a first set of perforations and a second set of perforations, wherein said annular horn body is completely enveloped within said internal resonance chamber except for a section of said tubular mouthpiece that extends out of said housing; and wherein said ribs engage said annular horn body within said internal resonance chamber and orient said annular horn body so that said first set of perforations are disposed above said both said membrane and said top surface of said horn body, and said second set of perforations are disposed below said bottom surface of said horn body.