US Patent 10178464 Earpiece

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.