Patent ID: 6987445

Claim:
A noise-making assembly comprising: a piezoelectric transducer; a sound-amplifying housing adjacent the transducer, the sound-amplifying housing enclosing a space communicating with the transducer for receiving sound waves from the transducer, the sound amplifying housing further having a front face, said housing further comprising at least a first cavity, wherein said first cavity is adjacent said piezoelectric transducer and amplifies sounds emitted by the piezoelectric transducer; a water resistant, sound permeable barrier adjacent to said front face adjacent the first cavity for preventing water from entering the first cavity and affecting the piezoelectric transducer; and a water resistant, hydrophobic fastener, said fastener mating with said sound-amplifying housing adjacent the first cavity for preventing water from entering the first cavity and affecting the piezoelectric transducer; wherein the water resistant sound permeable barrier is constructed of polytetrafluoroethylene.