Patent
Method for determining absolute current density through an implanted electrode
Reads0
Chats0
TLDR
In this article, the fundamental and harmonic components of an electrical current passing through an implanted electrode were measured and a difference transfer function was computed and used to determine absolute current density through the electrode.Abstract:
A method for determining absolute current density through an implanted electrode measures the fundamental and harmonic components of an electrical current passing through the electrode and estimates the absolute current density from the ratio between the magnitude of the electrical current measured at one of the harmonics on the fundamental frequency. Another method of the invention applies a wideband noise input voltage to the electrode under investigation and measures the spectrum of the input voltage and output current to determine a first transfer function. A second transfer function representing an increase magnitude of wideband noise input voltage is also obtained. A difference transfer function is computed and used to determine absolute current density through the electrode. The methods may be practiced non-invasively.read more
Citations
More filters
PatentDOI
Multi-peak speech processor
TL;DR: In this article, an improved pulsatile system for a cochlear prosthesis is described, which employs a multi-spectral peak coding strategy to extract a number of spectral peaks from an incoming acoustic signal received by a microphone.
PatentDOI
Contact transducer assembly for hearing devices
Rodney C. Perkins,Adnan Shennib +1 more
TL;DR: In this paper, the authors describe a contact transducer assembly for an electromagnetically driven hearing device such as a hearing aid or other audio signal reproducing device worn by a user.
PatentDOI
Inconspicuous communication method utilizing remote electromagnetic drive
TL;DR: In this paper, an inconspicuous hearing system is described that uses a coil (20) to electromagnetically couple with, and therefore drive, a permanent magnet (10) attached to the tympanic membrane (12) or ossicular chain.
Patent
Multifunction System and Method for Integrated Hearing and Communication with Noise Cancellation and Feedback Management
TL;DR: In this paper, an ear canal microphone and an external microphone are coupled to a transducer, such that the user perceives sound from the external microphone and the canal microphone with high frequency localization cues and decreased feedback.
PatentDOI
Systems and methods for photo-mechanical hearing transduction
TL;DR: In this paper, a light-responsive transducer component is adapted to receive light from the input transducers, which vibrates in response to the light input and produces vibrations in a component of a subject's hearing transduction pathway, such as the tympanic membrane, a bone in the ossicular chain, or directly on the cochlea.
References
More filters
Patent
A mult-channel implantable neural stimulator
TL;DR: In this article, a combination of a transmitter and implantable receiver is disclosed wherein data is conveyed from transmitter to receiver utilizing a data format in which each channel to be stimulated is adapted to convey information in monopolar, bipolar or analog form.
Patent
System for enhancing auditory stimulation and the like
TL;DR: In this article, a prosthetic device implanted in the cochlea is used to stimulate regions having a desired frequency response, and the detected signals are applied to electrodes on a prosthesis.
PatentDOI
Apparatus for multichannel cochlear implant hearing aid system
TL;DR: A hearing aid system using a pre-aligned, multichannel, intra-cochlear electrode array for electrically stimulating predetermined locations of the auditory nerve within the cochlea of the ear with selected frequency components of an external sound signal having magnitudes adjusted according to the requirements of the particular user.
Journal ArticleDOI
Electrical Stimulation with Pt Electrodes: AMethod for Determination of "Real" Electrode Areas
S. B. Brummer,M. J. Turner +1 more
TL;DR: An electrical method is described which is suitable for determining exposed areas of Pt-stimulation electrodes prior to implantation.
PatentDOI
Transcutaneous signal transmission system and methods
TL;DR: In this article, critical coupling at a predetermined distance is obtained by adjusting the spacing of the coils of the tuned circuits, whereby the output impedance of the transmitter decreases to one-half the transmitter's output impedance with no coupling.