Presented herein are techniques for generating information characterizing an amount of vibration isolation between an implantable vibration sensor and an implantable mechanical actuator (actuator), when each are implanted in a recipient. In particular, the implantable mechanical actuator is configured to generate and deliver, based on one or more actuator control signals, mechanical stimulation signals to the recipient. The vibration sensor is configured to capture vibrations induced by the delivery of the mechanical stimulation signals to the recipient. A vibrational transfer function relating a position of the vibration sensor to the actuator is then generated based on the captured vibrations and the attributes of the actuator control signals. The vibrational transfer function provides an indication of the vibration isolation present between the vibration sensor and the actuator, at their respective locations within the recipient.

Disclosed examples generally include methods and apparatuses related to microphone units, such as may be found in implantable medical devices (e.g., cochlear implants). Microphone units generally include a microphone element connected to a chamber having a concave floor with the chamber covered by a membrane. Microphone units can be configured to produce an output based on pressure waves (e.g., sound waves) that reach the membrane. In an example, a microphone unit has a pressurized gas within the chamber below the membrane such that, while in a static state, the membrane deflects away from the chamber floor.

A hearing prosthesis, comprising: a microphone; a sound processor; an external transmitter unit including a coil; an internal receiver unit including a coil; a stimulator unit, wherein the stimulator unit includes a control circuit, a voltage measurement component, a resistor and a signal generator, wherein the measurement circuit is configured to output a signal indicative of the voltage across the resistor; and a stimulating lead assembly array, wherein at least a portion of the hearing prosthesis is configured to apply an electrical signal to tissue inside a cochlea of a recipient, and at least a portion of the hearing prosthesis is configured to sense an electrical property inside of the cochlea that results from the applied electrical signal and the interaction of the applied electrical signal to the tissue.

A bone anchored hearing device includes an electromagnetic vibrator for generating a vibration in order to transmit sound through a bone of a user to an ear of the user; and a compensator for at least in part compensating a distortion in the vibration of the electromagnetic vibrator. Further, a signal processing method for a bone anchored hearing device includes providing, by an input transducer, an electric input signal representing sound of a surrounding of a user of the bone anchored hearing device; processing, by a signal processing unit, the electric input signal and providing a processed electric signal; generating, by an electromagnetic vibrator, based on the processed electric signal, a vibration in order to transmit sound through a bone of the user to an ear of the user; and at least in part compensating, by a compensator, a distortion in the vibration of the electromagnetic vibrator.

An implantable hearing aid system is disclosed. According to one or more of the mentioned aspects, the implantable hearing aid system comprises a charger unit which includes a coil unit having a first resonance frequency, a hearing aid and an implantable component. The hearing aid includes a rechargeable battery, an inductive coil arrangement having a second resonance frequency configured to form an inductive charging link with the coil unit to receive power signals from the charger unit. The implantable component includes an implantable coil, wherein the inductive coil arrangement may further be configured to form a transcutaneous link with the implantable coil to transmit at least one of data and power to the implantable component.

An external portion of an auditory prosthesis includes an external magnet that interacts with an implantable magnet to hold the external portion against the skin. Magnetic force generated by the stray field of these magnets can disturb the operation of a vibrating element of the auditory prosthesis. The technologies described herein utilize additional magnets disposed within portions of the auditory prosthesis to redirect the magnetic flux, which allows the vibrating element to be disposed more closely to the magnets, reducing the overall height profile of the prosthesis.

A processing device is interfaced with an auditory region of the brain of a subject that is responsible for auditory perception. The processing device receives signals associated with nerve impulses that are transmitted to the auditory region of the brain of the subject in response to sound collected by an ear of the subject. The processing device processes the received signals and generates at least one audio signal that is representative of the auditory perception, by the subject, of the sound collected by the ear. In certain embodiments, the processing device processes at least one audio signal that is representative of at least one sound to convert the at least one audio signal to a sequence of nerve impulses, and selectively provides the sequence of nerve impulses to the auditory region of the brain of the subject such that the subject audially perceives the at least one sound.

An external component of a bone conduction device, including a vibrator and a platform configured to transfer vibrations from the vibrator to skin of the recipient, wherein the vibrator and platform are configured to quick connect and quick disconnect to and from, respectively, one another.

A magnet arrangement for an implantable medical device is described. An implant magnet has a modified disc shape and is capable of responding to an external magnetic field by rotating about a primary center rotation axis. The implant magnet shape has at least one cross-sectional view in which the cylindrical diameter corresponds to a horizontal coordinate axis, the center symmetry axis corresponds to a vertical coordinate axis, the height between the end surfaces is greatest at the center symmetry axis, and the height between the end surfaces progressively decreases from the center symmetry axis along the cylindrical diameter towards the outer circumference to define a secondary deflection angle with respect to the horizontal coordinate axis so that the implant magnet is capable of responding to the external magnetic field by deflecting within the secondary deflection angle about a secondary deflection axis defined by a cylinder diameter normal to the cross-sectional view.

An inductive charging case in accordance with certain embodiments presented herein comprises a base and a lid mechanically coupled together via a hinge mechanism. When the inductive charging case is in a closed arrangement (e.g., the lid is positioned adjacent to the base), the lid and base collectively define an interior volume that is configured to enclose an electronic device therein. The electronic device includes one or more rechargeable batteries, a receiver coil, and circuitry for recharging the one or more rechargeable batteries, while the inductive charging case includes inductive charging circuitry, including at least one inductive charging coil, that is configured to provide power to the electronic device which is then used to charge the one or more rechargeable batteries and/or power the electronic device.