US Patent 7872946 Autonomous waterproof electronic signaling device

The autonomous waterproof electronic signaling device disclosed comprises an activator; a signal emitter, said signal emitter to emit a primary signal upon activation of said activator, said signal emitter comprising one or more of the following: a hydrophone, a siren, a speaker, or a transducer; and a head assembly, said head assembly positioned so as to alter at least a portion of said primary signal producing a notification signal.