Patent ID: 9191125
Filing Date: 2015-11-17
Classification: G08C,H04B

Abstract:
1. An apparatus for the transmission of an acoustic signal through a solid rigid substrate comprising: a first acoustic transducer for converting electrical signals into acoustic signals, the first acoustic transducer being mounted on a first face of a solid rigid substrate to transmit the acoustic signals into the substrate; a second acoustic transducer mounted on a second face of the substrate so as to receive acoustic signals emitted by the first acoustic transducer and to convert the acoustic signals into electrical signals; and characterised in that at least one of the acoustic transducers is mounted on its respective face of the substrate via an intermediate element, the at least one of the acoustic transducers being bonded by a first bonding layer to the intermediate element, and the intermediate element being attached to the substrate, wherein the intermediate element has mounting pads on a bottom surface, separated from each other, the mounting pads configured to contact the substrate, the mounting pads defining a space between the remainder of the bottom surface of the intermediate element and the substrate.