Cochlear Synaptopathy and Hidden Hearing Loss
Conditions
Interventions
Noise exposure hearing normal population:N/A
Hearing function normal population without history of noise exposure:N/A
Sponsors
Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University, School of Medicine
Eligibility
Sex/Gender
All
Age
23 Years to No maximum
Inclusion criteria
Inclusion criteria: (1)Exposure Group Aged 23 to 40 years; No ear disease history; Otoscope examine to check the external auditory canal and tympanic membrane for both ears are all right. Type A tympanogram for both ears. Hearing threshold 500, 1000,2000,3000,4000,6000,8000 Hz less than or equal to 25 dB HL. Working noise exposure more than or equal to 8h>80 dB(A) LAeq every working day. Working hour 8 hours, 5 days per week. Working years more than or equal to 5 years. (2) Control Group Aged 23 to 40 years; No ear disease history; Otoscope examine to check the external auditory canal and tympanic membrane for both ears are all right. Type A tympanogram for both ears. Hearing threshold 500, 1000,2000,3000,4000,6000,8000 Hz less than or equal to 25 dB HL. None occupational or damaged noise exposure history. Entertainment noise acceptation < 20 hr per week. No shooting hobby, No working noise exposure history.
Exclusion criteria
Exclusion criteria: Unable to finish the psychophysics and electrophysiology tests.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Speech perception in noise; | — |
Secondary
| Measure | Time frame |
|---|---|
| SP/AP;Gap Threshold;Temporal Modulation Transfer Function ; | — |
Countries
China
Contacts
Public ContactLi Bei
Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University, School of Medicine
Outcome results
None listed