Improved biocompatible transducers

H - Electricity – 04 – R

Patent

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Details

H04R 25/00 (2006.01) G02C 11/06 (2006.01) H04R 25/02 (2006.01)

Patent

CA 2246281

An improved fully implantable hearing aid (10) in a first aspect includes at least two microphones (28) to provide improved noise cancellation, and, with an array (132) of microphones (28), improved directivity. In a second aspect, the hearing aid (10) includes an improved microactuator (32') in which deflections of a pair of piezoelectric plates (68) are coupled by liquid (52') to a flexible diaphragm (44') for stimulating fluid (20a) within an inner ear (17) of a subject (12). In a third aspect, the improved hearing aid (10) includes a directional booster (200) that the subject (12), having an implanted hearing aid (10), may wear on their head (122) for increasing directivity of perceived sound. A fourth aspect of the present invention is an improved implantable microactuator (32", 32"') that generates a mechanical displacement of a diaphragm (82) or a face (96) in response to an applied electrical signal. A liquid coupling between the piezoelectric transducer (54", 54''') and the diaphragm (82) or face (96) provides a mechanical impedance match for the transducer (54", 54''').

Prothèse auditive améliorée (10) totalement implantable comprenant, dans un premier aspect, au moins deux microphones (28) permettant d'améliorer la suppression du bruit et, avec un ensemble (132) de microphones (28), d'améliorer la directivité. Dans un deuxième aspect, la prothèse auditive (10) comprend un micro-organe de commande amélioré (32') dans lequel les fléchissements d'une paire de plaques piézo-électriques (68) communiquent par un liquide (52') avec une membrane souple (44') afin de stimuler le fluide (20a) de l'oreille interne (17) du sujet (12). Dans un troisième aspect, la prothèse auditive améliorée (10) comprend un renforçateur directionnel (200) que le sujet (12), possédant une prothèse auditive implantée, peut porter sur sa tête (122) afin de renforcer la directivité du son perçu. Un quatrième aspect de l'invention réside dans l'amélioration d'un micro-organe de commande implantable (32', 32"') produisant un déplacement mécanique d'une membrane (82) ou d'une face (96) en réaction à l'application d'un signal électrique. Une communication liquide entre le transducteur piézo-électrique(54", 54 "') et la membrane (82) ou la face (96) permet d'obtenir une correspondance d'impédance mécanique pour le transducteur (54", 54"').

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