Stimulus timing for a stimulating medical device
First Claim
1. A stimulating medical device, comprising:
- one or more band-pass filters configured to filter a received signal to obtain a set of band-pass filtered signals;
one or more envelope detectors configured to determine an envelope for at least one band-pass filtered signal of the set of band-pass filtered signals; and
one or more pulse time selectors configured to determine a variable pulse rate for stimulation pulses at a stimulation channel of the stimulating medical device, wherein the stimulation channel is associated with the at least one band pass filtered signal and the variable pulse rate corresponds to a frequency of the envelope of the at least one band-pass filtered signal.
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Abstract
Methods and systems are disclosed for determining the timing of stimulation applied using a medical device. 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 determines the envelopes of these band-pass filtered signals. Next, the medical device determines the stimulation timing (i.e., the pulse times) for the corresponding stimulation channel based on the timing of a particular phase (e.g., a peak, a minimum, etc.) of the envelope. A pulse amplitude for the stimulation channel may then be determined, and stimulation applied using the determined amplitude and pulse time.
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Citations
20 Claims
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1. A stimulating medical device, comprising:
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one or more band-pass filters configured to filter a received signal to obtain a set of band-pass filtered signals; one or more envelope detectors configured to determine an envelope for at least one band-pass filtered signal of the set of band-pass filtered signals; and one or more pulse time selectors configured to determine a variable pulse rate for stimulation pulses at a stimulation channel of the stimulating medical device, wherein the stimulation channel is associated with the at least one band pass filtered signal and the variable pulse rate corresponds to a frequency of the envelope of the at least one band-pass filtered signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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filtering a received signal to obtain a set of band-pass filtered signals; determining an envelope for at least one band-pass filtered signal of the band-pass filtered signals; determining a variable pulse rate for a stimulation channel of a stimulating medical device, wherein the stimulation channel is associated with the at least one band pass filtered signal, and wherein the variable pulse rate corresponds to a frequency of the envelope of the at least one band-pass filtered signal; and delivering stimulation pulses via the stimulation channel using the variable pulse rate. - View Dependent Claims (9, 10, 11, 12)
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13. A bilateral implant system, comprising:
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a first cochlear implant fitted to a first ear of a recipient; and a second cochlear implant fitted to a second ear of the recipient, wherein the first and second cochlear implants each comprise; one or more band-pass filters configured to filter a received signal to obtain a set of band-pass filtered signals; one or more envelope detectors configured to determine an envelope for at least one band-pass filtered signal of the band-pass filtered signals; and one or more pulse time selectors configured to determine a variable pulse rate for stimulation pulses at a stimulation channel of the respective cochlear implant, wherein the stimulation channel is associated with the at least one band pass filtered signal, and wherein the variable pulse rate corresponds to a frequency of the envelope of the at least one band-pass filtered signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification