Stimulation channel selection for a stimulating medical device
First Claim
1. A method for delivering a stimulating signal by a stimulating medical device having a plurality of electrodes, comprising:
- receiving a signal;
filtering the received signal to obtain a first set of one or more band-pass filtered signals;
selecting a first stimulation channel corresponding to a band-pass filtered signal of the first set based on an amplitude of the corresponding band-pass filtered signal;
determining if a difference between an amplitude of the band-pass filtered signal for the selected first stimulation channel and an amplitude of a band-passed filtered signal for a stimulation channel adjacent the selected stimulation channel exceeds a threshold;
selecting the adjacent stimulation channel based on whether the threshold is exceeded;
determining an amplitude for application of stimulation on the first stimulation channel and an amplitude for application of stimulation on the adjacent stimulation channel; and
delivering a stimulation signal on the first stimulation channel and a stimulation signal on the adjacent stimulation channel in accordance with the determined amplitudes.
1 Assignment
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Accused Products
Abstract
Methods and systems are disclosed for determining the stimulation channels for application of stimulation by a medical device, such as a cochlear implant or an auditory brain stimulator. In embodiments, the medical device filters a received signal to obtain a plurality of band-pass filtered signals, each corresponding to one or more stimulation channels. The medical device then selects a stimulation channel for application of stimulation based on the amplitudes of the band-pass filtered signals. The medical device determines whether to apply stimulation on the adjacent stimulation channels by determining if the amplitude of the corresponding adjacent stimulation channel exceeds an information limit. If the amplitudes for either adjacent channel fall below the information limit, the corresponding adjacent stimulation channel is eliminated from consideration. The medical device further may determine the amplitudes for application of stimulation on the adjacent stimulation channels, if selected, using a pitch steering function. This pitch steering function may specify a current level difference between the selected stimulation channel and the adjacent stimulation channel to use in applying the stimulation.
50 Citations
34 Claims
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1. A method for delivering a stimulating signal by a stimulating medical device having a plurality of electrodes, comprising:
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receiving a signal; filtering the received signal to obtain a first set of one or more band-pass filtered signals; selecting a first stimulation channel corresponding to a band-pass filtered signal of the first set based on an amplitude of the corresponding band-pass filtered signal; determining if a difference between an amplitude of the band-pass filtered signal for the selected first stimulation channel and an amplitude of a band-passed filtered signal for a stimulation channel adjacent the selected stimulation channel exceeds a threshold; selecting the adjacent stimulation channel based on whether the threshold is exceeded; determining an amplitude for application of stimulation on the first stimulation channel and an amplitude for application of stimulation on the adjacent stimulation channel; and delivering a stimulation signal on the first stimulation channel and a stimulation signal on the adjacent stimulation channel in accordance with the determined amplitudes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for use in delivering a stimulating signal by a stimulating medical device having a plurality of electrodes, comprising:
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a first filter bank configured to filter a received signal to obtain a first set of one or more band-pass filtered signals; a channel selector configured to select a first stimulation channel corresponding to a band-pass filtered signal of the first set based on an amplitude of the corresponding band-pass filtered signal, determine if a difference between an amplitude of the band-pass filtered signal for the selected first stimulation channel and an amplitude of a band-passed filtered signal for a stimulation channel adjacent the selected stimulation channel exceeds a threshold, and select the adjacent stimulation channel based on whether the threshold is exceeded; an amplitude selector configured to determine an amplitude for application of stimulation on the first stimulation channel and an amplitude for application of stimulation on the adjacent stimulation channel; and a transmitter configure to transmit a stimulation signal for delivering stimulation on the first stimulation channel and a stimulation signal for delivering stimulation on the adjacent stimulation channel in accordance with the determined amplitudes. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system for delivering a stimulating signal by a stimulating medical device having a plurality of electrodes, comprising:
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means for receiving a signal; means for filtering the received signal to obtain a first set of one or more band-pass filtered signals; means for selecting a first stimulation channel corresponding to a band-pass filtered signal of the first set based on an amplitude of the corresponding band-pass filtered signal; means for determining if a difference between an amplitude of the band-pass filtered signal for the selected first stimulation channel and an amplitude of a band-passed filtered signal for a stimulation channel adjacent the selected stimulation channel exceeds a threshold; means for selecting the adjacent stimulation channel based on whether the threshold is exceeded; means for determining an amplitude for application of stimulation on the first stimulation channel and an amplitude for application of stimulation on the adjacent stimulation channel; and means for delivering a stimulation signal on the first stimulation channel and a stimulation signal on the adjacent stimulation channel in accordance with the determined amplitudes.
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Specification