Abstract: A ballistic helmet comprising a ballistic shell, wherein within the thickness of the ballistic shell, or inside the ballistic shell, there is provided one or more circuit layers forming a circuit, which circuit comprises a power bus and a data bus, and wherein one or more power connections and one or more data connections are provided on the inside and/or on an edge of the ballistic shell for providing power and data to/from one or more electrical devices through the circuit.

Abstract: A ballistic helmet comprising a ballistic shell, wherein within the thickness of the ballistic shell, or inside the ballistic shell, there is provided one or more circuit layers forming a circuit, which circuit comprises a power bus and a data bus, and wherein one or more power connections and one or more data connections are provided on the inside and/or on an edge of the ballistic shell for providing power and data to/from one or more electrical devices through the circuit.

Abstract: An earpiece comprising an earbud, which is arranged such that it may be inserted into the ear canal of a user, and a housing, which houses at least one microphone that is arranged to sample the ambient environment, the housing comprising a port through which sound may be received by the microphone, the earpiece being arranged such that when the earbud is inserted into the ear canal of a user the microphone samples the ambient environment between the earpiece and the concha.

Abstract: A ballistic helmet comprising a ballistic shell, wherein within the thickness of the ballistic shell, or inside the ballistic shell, there is provided one or more circuit layers forming a circuit, which circuit comprises a power bus and a data bus, and wherein one or more power connections and one or more data connections are provided on the inside and/or on an edge of the ballistic shell for providing power and data to/from one or more electrical devices through the circuit.

Abstract: An earpiece comprising an earbud, which is arranged such that it may be inserted into the ear canal of a user, and a housing, which houses at least one microphone that is arranged to sample the ambient environment, the housing comprising a port through which sound may be received by the microphone, the earpiece being arranged such that when the earbud is inserted into the ear canal of a user the microphone samples the ambient environment between the earpiece and the concha.

Abstract: An earpiece for a hearing protection device arranged to provide hearing protection in environments with medium to high ambient noise levels, the earpiece comprising a body (2), an earbud, which is arranged to be inserted into an ear canal of a user to block the ear canal of the user, and a cable (3), wherein the earbud and the cable extend from the body, and the earpiece is arranged such that when the earbud is received by the ear canal of the user's left ear, the cable extends from the body in an upwardly or downwardly direction, and when the earbud is received by the ear canal of the user's right ear, the cable extends from the body in the other of the upwardly or downwardly directions.

Abstract: An earpiece for a hearing protection device comprising an earbud (301), which is arranged such that it may be inserted into the ear canal of a user to block the ear canal of the user, wherein an acoustic pathway (303) is provided, which extends through the earpiece, and wherein an acoustic resistor (304) is provided that blocks the acoustic pathway, which acoustic resistor comprises an air permeable material.