Abstract: Audio apparatus (30) comprising a piezoelectric transducer (44) and coupling means (54) for coupling the transducer to a user's pinna (32) whereby the transducer excites vibration in the pinna (32) to cause it to transmit an acoustic signal from the transducer (44) to a user's inner ear, characterised in that the transducer is embedded in a casing (42) of relatively soft material and the casing (42) is mounted to a housing (34) of relatively hard material such that a cavity (48) is defined between the casing (42) and housing (34).

Abstract: Audio apparatus (50) comprising a transducer and a coupler for coupling the transducer to a user's pinna. The coupler may be in the form of a hook (56), and leads (58) connect the audio apparatus (50) to a remote sound source. The transducer (52) is mounted to a lower straight end of the hook (56). An upper curved end of the hook (56) hooks over the junction between the user's ear and head so that the transducer (52) touches a lower rear face of the pinna adjacent the concha. The transducer excites vibration in the pinna whereby an acoustic signal from the transducer is transmitted to the user's inner ear by radiation of pressure waves and/or by conduction of vibrational energy through the outer and middle ear.