Abstract: An acoustically shielded speaker enclosure for use in the ear pockets of motorcycle helmets is disclosed wherein parasitic sound waves emitted from the rear side of an enclosed audio loudspeaker are prevented from entering the motorcycle rider's ear and from mixing with and distorting the primary sound waves issued from the audio loudspeaker directed at the rider's ear. The acoustically shielded speaker enclosure consists of a pair of joined together cup-shaped housing assemblies forming a shortened cylinder adapted to enclose and secure an audio loudspeaker, the enclosure having openings in one face of the housing assemblies to allow passage of the primary sound waves from the contained loudspeaker. An acoustic shield attached to the speaker enclosure cylindrical side extends to the edge of the ear pocket and is sealed there.

Abstract: A vented speaker enclosure for use in the ear pockets of motorcycle helmets is disclosed which carries off parasitic sound waves emitted from the rear side of an enclosed audio loudspeaker in order that the parasitic sound waves not be allowed to enter the motorcycle rider's ear and distort the primary sound waves issued from the audio loudspeaker. The vented speaker enclosure consists of a pair of joined together cup-shaped housing assemblies adapted to enclose and secure the audio loudspeaker, having openings in one face of the housing assemblies to allow passage of the sounds waves from the contained louspeaker, and a venting tube connected to an opening through the peripheral wall of the speaker enclosure, the vent tube carrying off and away the parasitic sounds emanating from the rear of the loudspeaker. The venting tube is situated in creases of the helmet inner cushion leading to the outside.

Abstract: A microphone mount and plug mount for attaching to the side of a motorcyclist's helmet, said microphone mount adapted to secure a microphone boom positioning a microphone proximate the motorcyclist's mouth, the motorcycle mount characterized by a clamp portion adapted to forcefully engage the bottom edge of the helmet with minimum structure below the edge of the helmet, and a boom seat to receive the boom base and passage of electrical wires from the microphone mount. The plug mount defines a clamp portion similarly adapted to surround the lower edge of the helmet, and a plug seat defining a cavity adapted to receive a electrical plug and an opening to said plug seat cavity to receive electrical wires from said microphone mount and from a headset mounted interiorly to said helmet, the electrical plug receiving a mating electrical plug attached to wires connecting with audio accessories located on said motorcycle.