Validation method for a novel encoding of temporal fine structure in cochlear implant tonal language
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A fine structure, cochlear implant technology, applied in artificial respiration, electrotherapy, treatment, etc., can solve the problem of lack of evaluation value
Active Publication Date: 2022-04-12
CHONGQING UNIV
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In view of the fact that the simulation research is aimed at the simplification of the real system under the specific research target conditions, it can only have important reference significance for the actual system experiment, and always lacks real and effective evaluation value
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Embodiment 1
[0079] see Figure 1 to Figure 5 , a method for verifying the novel encoding of time domain fine structure of cochlear implant tone language, which mainly includes the following steps:
[0080] 1) Establish spatio-temporal quantitative model I of the original speech-induced inferior colliculus neural response. The main steps are as follows:
[0081] 1.1) Select an experimental organism model suitable for the study of auditory neural pathways.
[0082] Preferably, in this embodiment, guinea pigs are selected as the experimental organisms, and the natural auditory neural pathways of the guinea pigs are fully utilized to verify and evaluate the new time domain fine structure coding of the cochlear implant tone language.
[0083] Further, rats, Mongolian gerbils, etc. can also be selected as experimental organisms.
[0084] 1.2) Perform an audiometry curve test on the single ear of the experimental organism using the CLICK sound signal. The tests mainly include hearing thresho...
Embodiment 2
[0145] In this embodiment, the verification method of the novel encoding of the time-domain fine structure of the cochlear implant tone language is compared with the mathematical simulation method of the auditory neural network. The mathematical simulation method of the auditory neural network can be found in figure 2 . The comparison steps are as follows:
[0146] 1) Using the verification method of the novel encoding of the time-domain fine structure of the cochlear implant tone language to verify the new encoding of the time-domain fine structure of the cochlear implant tone language to be verified. The main steps are as follows:
[0147] 1.1) Select the experimental organism. In this embodiment, guinea pigs are selected as the experimental organisms.
[0148] 1.2) Establish the original speech stimulus-induced inferior colliculus nerve response mode I(Y special_o )
[0149] 1.3) Establishment of a new coded speech electrical stimulation-induced inferior colliculus n...
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Abstract
The invention discloses a method for verifying the novel coding of time-domain fine structure of the artificial cochlear tone language, which mainly includes the following steps: 1) Selecting experimental organisms. 2) Establish spatio-temporal quantitative model I of the original speech-induced inferior colliculus neural response. 3) To establish the spatio-temporal pattern II of the inferior colliculus neural response evoked by the novel coded tone speech stimulus. 4) To establish the spatio-temporal pattern III of the inferior colliculus nerve response induced by electrical stimulation of the new coded speech. 5) By adjusting the parameters of the electrical stimulation mode corresponding to the speech coding, the spatiotemporal mode III of the inferior colliculus nerve response induced by the electrical stimulation of the new coded speech is approached to the spatiotemporal quantitative mode I of the inferior colliculus neural response induced by the original speech. The invention can more truly, objectively and accurately reflect the acceptance degree of the biological auditory pathway to a certain sound coding strategy, and can be used as an auxiliary evaluation method for the new type of cochlear artificial speech coding.
Description
technical field [0001] The invention relates to the technical field of a cochlear implant (CI) system, in particular to a verification method for a novel encoding of a time-domain fine structure of a tone language of a cochlear implant. Background technique [0002] At present, most CI users are close to the hearing performance of normal hearing people in standard hearing tests and daily speech recognition in a quiet environment, but there is still a gap in their hearing ability compared with normal hearing people. For example, CI implanters have poor speech perception in noisy environments: they have a hearing loss of nearly 15 dB in a steady-state noise background, and they have a hearing loss of nearly 30 dB in a competitive speech environment. The implanter's perception of music is also limited: if the recognition of rhythm is not satisfactory, the perception of melody and timbre can only be said to be negligible. Moreover, tonal language implanters are more prone to en...
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