# US 2025/0082935 A1 · Multidimensional coding of stimulation pulses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0082935 A1 - Document ID: US20250082935A1 - Status: Published application - Kind: A1 - Application number: 18/958,535 - Filed: 2024-11-25 - Published: 2025-03-13 - Earliest claimed: 2020-09-14 - Assignees: Cochlear Limited - Applicants: Cochlear Limited - Inventors: Aswin Adris Wijetillake; Kai Dang; Manuel Segovia Martinez - Web page: https://patentgrep.com/patent/US20250082935A1 ## CPC - A61N 1/36038: {Cochlear stimulation} - A61N 1/36039: {fitting procedures} - A61N 1/0541: {Cochlear electrodes} - A61N 1/36175: {Pulse width or duty cycle} - G10L 19/02: using spectral analysis, e.g. transform vocoders or subband vocoders - H04R 25/505: {using digital signal processing} - H04R 25/604: {of acoustic or vibrational transducers} - H04R 2225/43: Signal processing in hearing aids to enhance the speech intelligibility - H04R 2225/67: Implantable hearing aids or parts thereof not covered by H04R25/606 - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract An aspect of the disclosure is to provide a cochlear implant system comprising; a microphone unit configured to receive an acoustical input and provide an audio signal based on the acoustical input, and where the audio signal comprises multiple acoustic parameters, an electrode array including a plurality of electrodes configured to apply a plurality of stimulation pulses to auditory nerve fibers of a recipient of the cochlear implant system based on the audio signal, a memory unit including a plurality of multidimensional perceptual models where each multidimensional perceptual model includes perceptual information as a function of coding parameter groups. ## Claims ### Claim 1 A method, comprising: at a hearing device, obtaining at least one audio signal comprising multiple acoustic parameters, wherein the hearing device includes a memory unit storing a plurality of multidimensional perceptual models, and wherein each multidimensional perceptual model includes perceptual information as a function of coding parameter groups; retrieving a selected multidimensional perceptual model of the plurality of multidimensional perceptual models from the memory unit; using the selected multidimensional perceptual model to convert the at least one audio signal into one or more processed signals such that at least one piece of perceptual information is encoded as function of the coding parameter groups in the selected multidimensional perceptual model; and generating, using the one or more processed signals, stimulation signals for delivery to a recipient of the hearing device. ### Claim 2 (depends on 1) The method of claim 1, wherein the selected multidimensional perceptual model is selected based on perceptual information of interest determined for a given time period, and wherein the perceptual information of interest varies with respect to one or more of the multiple acoustic parameters. ### Claim 3 (depends on 2) The method of claim 2, further comprising: determining the perceptual information of interest for a given time period based on a sound coding strategy selected for use by the hearing device. ### Claim 4 (depends on 2) The method of claim 2, further comprising: determining the perceptual information of interest for a given time period based on an acoustic environment of the hearing device. ### Claim 5 (depends on 1) The method of claim 1, wherein using the selected multidimensional perceptual model to convert the at least one audio signal into one or more processed signals comprises: selecting a sequence of coding parameter groups of the selected multidimensional perceptual model, processing the at least one audio signal into a plurality of band limited audio signals; mapping each coding parameter group of the sequence of coding parameter groups to one of the plurality of band limited audio signals based on an acoustic parameter of the multiple acoustic parameters to generate a plurality of mapped signals, and coding the plurality of mapped signals into a plurality of stimulation pulses for delivery to the recipient via a plurality of electrodes. ### Claim 6 (depends on 5) The method of claim 5, wherein the selected sequence of coding parameter groups fulfils at least one objective criterion while adhering to at least one constraint criterion. ### Claim 7 (depends on 6) The method of claim 6, wherein the at least one objective criterion is determined based on the perceptual information of interest, and wherein the at least one objective criterion is at least one of following: a maximized range and/or resolution of pitch of the recipient, a maximized loudness resolution of the recipient, a maximized timbre range and/or resolution perceived by the recipient, a maximized range and/or resolution of perceivable sound source direction, or a maximization of bimodal loudness fusion. ### Claim 8 (depends on 1) The method of claim 1, wherein the stimulation signals are delivered to the recipient of via an electrode array comprising a plurality of electrodes. ### Claim 9 (depends on 1) The method of claim 1, where the perceptual information is at least one of: pitch, timbre, loudness, perceived sound direction, and/or a distance to a sound source. ### Claim 10 (depends on 1) The method of claim 1, wherein each of the plurality of multidimensional perceptual models is customized for the recipient via a fitting procedure, or, wherein each of the plurality of multidimensional perceptual models is predetermined based on similar multidimensional perceptual models of other recipients of hearing devices. ### Claim 11 (depends on 1) The method of claim 1, wherein a coding parameter of a coding parameter group is a selection of at least one or more of following: a pulse rate, a pulse width, a pulse amplitude, a pulse shape, a number of by a stimulation channels, or a temporal onset used for sampling the at least one audio signal. ### Claim 12 (depends on 1) The method of claim 1, wherein a coding parameter of a coding parameter group is a selection of at least one or more of following: an interaural timing difference or an interaural level difference. ### Claim 13 A hearing device, comprising: one or more microphones configured to generate at least one audio signal comprising multiple acoustic parameters; a memory unit storing a plurality of multidimensional perceptual models, wherein each multidimensional perceptual model includes perceptual information as a function of coding parameter groups; a signal processor unit configured to: retrieve a selected multidimensional perceptual model of the plurality of multidimensional perceptual models from the memory unit, and use the selected multidimensional perceptual model to convert the at least one audio signal into one or more processed signals such that at least one piece of perceptual information is encoded as function of the coding parameter groups in the selected multidimensional perceptual model; and a coding unit configured to generate, using the one or more processed signals, stimulation signals for delivery to a recipient of the hearing device. ### Claim 14 (depends on 13) The hearing device of claim 13, wherein the selected multidimensional perceptual model is selected based on perceptual information of interest determined for a given time period, and wherein the perceptual information of interest varies with respect to one or more of the multiple acoustic parameters. ### Claim 15 (depends on 14) The hearing device of claim 14, wherein the signal processor unit is configured to determine the perceptual information of interest for a given time period based on a sound coding strategy selected for use by the hearing device. ### Claim 16 (depends on 14) The hearing device of claim 14, wherein the signal processor unit is configured to determine the perceptual information of interest for a given time period based on an acoustic environment of the hearing device. ### Claim 17 (depends on 13) The hearing device of claim 13, wherein signal processor unit is configured to: select a sequence of coding parameter groups of the selected multidimensional perceptual model; process the at least one audio signal into a plurality of band limited audio signals; and map each coding parameter group of the sequence of coding parameter groups to one of the plurality of band limited audio signals based on an acoustic parameter of the multiple acoustic parameters to generate a plurality of mapped signals; wherein the coding unit is configured to code the plurality of mapped signals into a plurality of stimulation pulses for delivery to the recipient via a plurality of electrodes. ### Claim 18 (depends on 17) The hearing device of claim 17, wherein the selected sequence of coding parameter groups fulfils at least one objective criterion while adhering to at least one constraint criterion. ### Claim 19 (depends on 18) The hearing device of claim 18, wherein the at least one objective criterion is determined based on the perceptual information of interest, and wherein the at least one objective criterion is at least one of following: a maximized range and/or resolution of pitch of the recipient, a maximized loudness resolution of the recipient, a maximized timbre range and/or resolution perceived by the recipient, a maximized range and/or resolution of perceivable sound source direction, or a maximization of bimodal loudness fusion. ### Claim 20 (depends on 13) The hearing device of claim 13, where the perceptual information is at least one of: pitch, timbre, loudness, perceived sound direction, and/or a distance to a sound source.