noise induced hearing loss
Conditions
Interventions
noise exposure group:N
non-noise exposure group:N
Sponsors
Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine
Eligibility
Sex/Gender
All
Age
20 Years to 40 Years
Inclusion criteria
Inclusion criteria: 1. No history of ear diseases, no history of occupational or traumatic noise exposure, weekly exposure to entertaining noise <20 hours, no shooting habbit 2. the ear canal and tympanic membrane were normal, the tympanometry graph was type A, each frequencyof 0.25, 0.5,1,2,4,6,and 8kHz hearing threshold is less than 25dB HL 3. Aged 20-40 years old healthy young adults
Exclusion criteria
Exclusion criteria: 1. Individual who has a history of head or ear injury, familial or congenital deafness, ototoxic drug use, otitis media, mumps, measles, tympanic membrane perforation , etc.; 2. Individual whose pure tone hearing test curve seems horizontal or approximate linear, or the linguistic frequency hearing loss is greater than or equal to the high frequency hearing loss, and pseudo deaf, etc.; 3. With history of ear diseases, history of occupational or traumatic noise exposure, weekly exposure to entertaining noise >20 hours, shooting hobby.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| speech-in-noise intelligibility;EcochG; | — |
Secondary
| Measure | Time frame |
|---|---|
| DPOAE;acoustic reflex; | — |
Countries
China
Contacts
Public ContactWu Hao
Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine
Outcome results
None listed