Patent ID: 8687835

Claim:
An electropneumatic horn assembly, said horn assembly comprising: an electric compressor unit having at least a compressor air inlet and a compressor air outlet for the supply of compressed air; a monolithic housing assembly having a first housing portion embodying an opening defining a space for reception of said compressor unit in said first housing portion, said housing assembly having a second housing portion; a sound wave generator system including: at least one acoustic chamber formed between an inner acoustic housing and an outer acoustic housing, said acoustic chamber having an opening for introduction of compressed air, a substantially planar membrane member uninterrupted by a vent opening and rigidly removably secured between said inner acoustic housing and said outer acoustic housing, said outer acoustic housing provided with an air inlet channel oriented downwardly for allowing entry of ambient air into said acoustic chamber, said chamber further having at least one acoustic duct housed in said housing assembly and communicating between said at least one acoustic chamber and at least one horn outlet to propagate sound generated by said membrane member outside said horn; and air channeling means for communicating between said compressor air outlet of said compressor unit and said opening of said at least one acoustic chamber.