Sensorineural hearing loss (SNHL)
Conditions
Interventions
Cochlear Implantation Listeners:deafness and wearing bilateral cochlear implants
Bimodal Listeners(C group):deafness and wearing a cochlear implant and a contralateral hearing aid
Normal-Hearing Participants (Group A):Behavioral testing under controlled noise conditions
Sponsors
Beijing Chao-Yang Hospital, Capital Medical University
Eligibility
Sex/Gender
All
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: 1.Inclusion Criteria for Normal-Hearing Participants (Group A): Normal auricle morphology, patent external auditory canal, and intact tympanic membrane. Four-frequency (500, 1000, 2000, and 4000 Hz) pure-tone average (4f-PTA) < 25 dB HL in both ears. Bilateral tympanometry shows type A curves, and ipsilateral and contralateral acoustic reflexes can be elicited. Able to cooperate with all relevant assessments and complete tests and questionnaires under guidance. Voluntarily agrees to participate and signs the informed consent form. 2.Inclusion Criteria for Bilateral Cochlear Implant Users (Group B): Patients with bilateral cochlear implants, either simultaneous or sequential implantation; the second-side cochlear implant has been activated for more than 3 months. Wears both devices regularly every day, with a total daily usage of at least 10 hours. Morphology of bilateral cochleae and auditory nerves is basically normal, without significant malformations. No clear cognitive impairment, intellectual disability, or psychiatric disorders. Able to cooperate with all relevant assessments and complete tests and questionnaires under guidance. Voluntarily agrees to participate and signs the informed consent form. 3.Inclusion Criteria for Bimodal Hearing Users (Group C): Patients with a unilateral cochlear implant, activated for more than 3 months post-implantation. Wears a hearing aid on the contralateral side, with the four-frequency average hearing threshold (500, 1000, 2000, 4000 Hz) = 50 dB HL on that side. Wears both the cochlear implant and contralateral hearing aid regularly every day, with a total daily usage of at least 10 hours. Morphology of bilateral cochleae and auditory nerves is basically normal, without significant malformations. No clear cognitive impairment, intellectual disability, or psychiatric disorders. Able to cooperate with all relevant assessments and complete tests and questionnaires under guidance. Voluntarily agrees to participate and signs the informed consent form.
Exclusion criteria
Exclusion criteria: 1.Active otologic diseases. 2.Severe cognitive impairment, significant intellectual disability affecting self-care, or serious psychiatric disorders. 3.History of major structural brain lesions (e.g., severe cerebrovascular disease, epilepsy, brain tumors, etc.). 4.Cervical spine disorders preventing normal head rotation. 5.Any other conditions that, in the investigator’s judgment, make the participant unsuitable for this study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| spatial release from masking;mismatch negativity(MMN); | — |
Secondary
| Measure | Time frame |
|---|---|
| root-mean-squared error(RMSE);cortical auditory evoked potential(CAEP); | — |
Countries
China
Contacts
Public ContactLi Jiaying
Beijing Chao-Yang Hospital, Capital Medical University
Outcome results
None listed