Multi-electrode channel configurations for a hearing prosthesis
First Claim
1. A method for determining weights for a stimulation channel of a stimulating hearing prosthesis having a plurality of electrodes, wherein the stimulation channel uses the determined weights in providing stimulation using a plurality of the electrodes of the stimulating medical device, the method comprising:
- determining a transimpendance matrix for the plurality of electrodes;
computing, at an error minimization module, a transadmittance matrix for the plurality of electrodes, the transadmittance matrix being a matrix inversion of the transimpedance matrix;
computing, at the error minimization module, an error value based on positive off-diagonal values of the transadmittance matrix;
determining if the error value exceeds a criterion level value;
adjusting, at the error minimization module, a diagonal of the transimpedance matrix in response to determining that the criterion level value is exceeded;
calculating, at a weight calculation module, the corresponding weights for the plurality of electrodes for the stimulation channel using the adjusted transimpedance matrix; and
providing, via an interface, the calculated weights to the stimulating medical device for use in providing stimulation to a recipient of the stimulating medical device.
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Accused Products
Abstract
An apparatus and method for determining stimulation channels for a stimulating device is provided. This method and apparatus may involve computing a set of weights for the plurality of stimulation channels of the stimulating hearing prosthesis. These weights may be determined by determining a transimpedance matrix for the stimulating hearing prosthesis where a diagonal of the transimpedance matrix is determined by extrapolation. A transadmittance matrix may then be computed for this transimpedance matrix. An error may then be computed base on positive off-diagonal terms of the transadmittance matrix. The apparatus and method may determine the weights for the stimulation channels by determining an adjustment to the diagonal of the transimpedance matrix that results in a computed error that does not exceed a specified criterion level.
25 Citations
20 Claims
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1. A method for determining weights for a stimulation channel of a stimulating hearing prosthesis having a plurality of electrodes, wherein the stimulation channel uses the determined weights in providing stimulation using a plurality of the electrodes of the stimulating medical device, the method comprising:
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determining a transimpendance matrix for the plurality of electrodes; computing, at an error minimization module, a transadmittance matrix for the plurality of electrodes, the transadmittance matrix being a matrix inversion of the transimpedance matrix; computing, at the error minimization module, an error value based on positive off-diagonal values of the transadmittance matrix;
determining if the error value exceeds a criterion level value;adjusting, at the error minimization module, a diagonal of the transimpedance matrix in response to determining that the criterion level value is exceeded; calculating, at a weight calculation module, the corresponding weights for the plurality of electrodes for the stimulation channel using the adjusted transimpedance matrix; and providing, via an interface, the calculated weights to the stimulating medical device for use in providing stimulation to a recipient of the stimulating medical device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for determining weights for a stimulation channel of a stimulating hearing prosthesis having a plurality of electrodes, wherein the stimulation channel uses the determined weights in providing stimulation using a plurality of the electrodes of the stimulating hearing prosthesis, the apparatus comprising:
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an error minimization module configured to compute a transadmittance matrix by inverting a determined transimpedance matrix, compute an error value based on positive off-diagonal values of the computed transadmittance matrix, determine if the error value exceeds a criterion level value, and adjust a diagonal of the transimpedance matrix in response to determining that the criterion level value is exceeded; a weight calculation module configured to calculate corresponding weights for the plurality of electrodes for the stimulation channel; and an interface configured to provide the calculated weights to the stimulating hearing prosthesis for use in providing stimulation to a recipient of the stimulating hearing prosthesis. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer program embodied on a non-transitory computer readable medium, the computer program comprising program code for controlling a processor to execute a method for determining weights for a stimulation channel of a stimulating hearing prosthesis having a plurality of electrodes, wherein the stimulation channel uses the determined weights in providing stimulation using a plurality of the electrodes of the stimulating hearing prosthesis, the method comprising:
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determining a transimpendance matrix for the plurality of electrodes; computing a transadmittance matrix for the plurality of electrodes, the transadmittance matrix being a matrix inversion of the transimpedance matrix; computing an error value based on positive off-diagonal values of the transadmittance matrix;
determining if the error value exceeds a criterion level value;adjusting a diagonal of the transimpedance matrix in response to determining that the criterion level value is exceeded;
calculating the corresponding weights for the plurality of electrodes for the stimulation channel using the adjusted transimpedance matrix; andproviding the calculated weights to the stimulating hearing prosthesis for use in providing stimulation to a recipient of the stimulating hearing prosthesis.
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20. An apparatus for determining weights for a stimulation channel of a stimulating device having a plurality of electrodes, wherein the stimulation channel uses the determined weights in providing stimulation using a plurality of the electrodes of the stimulating hearing prosthesis, the apparatus comprising:
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means for determining a transimpendance matrix for the plurality of electrodes; means for computing a transadmittance matrix by inverting the transimpedance matrix;
means for computing a transadmittance matrix for the plurality of electrodes, the transadmittance matrix being a matrix inversion of the transimpedance matrixmeans for determining if the error value exceeds a criterion level value; means for adjusting a diagonal of the transimpedance matrix in response to determining that the criterion level value is exceeded; means for calculating the corresponding weights for the plurality of electrodes for the stimulation channel using the adjusted transimpedance matrix; and means for providing the calculated weights to the stimulating hearing prosthesis for use in providing stimulation to a recipient of the stimulating hearing prosthesis.
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Specification