Conductive Hearing Loss, Middle Ear, Normal Hearing
Conditions
Keywords
wideband acoustic immittance, Normal hearing, Thai adults, Conductive hearing loss, Absorbance
Brief summary
The goal of this descriptive study is to collect the wideband immittance data in Thai normal hearing and conductive hearing loss adults. The main questions it aims to answer are: 1. What is normative data of wideband acoustic immittance in Thai normal hearing adults 2. What is the wideband acoustic immittance data in Thai conductive hearing loss who have type A, AS and Ad tympanogram Participants will examine hearing tests consequently * pure tone audiometry * Tympanometry with ipsilateral acoustic reflex * Wideband acoustic immittance
Interventions
None listed
Sponsors
Prince of Songkla University
Chiang Mai University
Khon Kaen University
Study design
Observational model
OTHER
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 59 Years
Healthy volunteers
Yes
Inclusion criteria
Normal group 1. Thai adults (18-60 years old) 2. Pure-tone air-conduction thresholds ≤ 25 dB HL, measured at audiometric frequencies 250, 500, 1000, 2000, 3000, 4000, 6000 and 8000 Hz and air-bone gab \< 10 dBHL at frequencies 500, 1000, 2000 and 4000 Hz 3. Type A tympanogram with present ipsilateral acoustic reflex 4. No diagnosis of middle ear disease 5. No history of middle ear surgery 6. Normal finding in otoscopic examination Conductive hearing loss group 1. Thai adults (18-60 years old) 2. Pure-tone air-conduction thresholds \> 25 dB HL, measured at audiometric frequencies 250, 500, 1000, 2000, 3000, 4000, 6000 and 8000 Hz and air-bone gab \> 10 dBHL at frequencies 500, 1000, 2000 and 4000 Hz at least 2 frequencies in one ear 3. Type A, As or Ad tympanogram with absent ipsilateral acoustic reflex 4. Normal finding in otoscopic examination 5. There is an appointment for exploration middle ear within 2 months
Exclusion criteria
1. Have previously had middle ear surgery 2. Have an earache 3. Type B or C tympanogram 4. Volunteers who do not cooperate in audiometry test or unable to do audiometry test
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Normative data of wideband acoustic immittance in Thai normal hearing adults | 3-4 months | Normative data of wideband acoustic immittance refers to wideband absorbance at peak pressure and wideband absorbance at ambient pressure at across frequency (226 to 8000 Hz.) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| The wideband acoustic immittance data in Thai adults conductive hearing loss | 16-18 months | The wideband acoustic immittance measures characteristic of conductive hearing loss with tympanogram types A, As, and Ad |
Countries
Thailand
Outcome results
None listed