hearing impairment hearing loss
Conditions
Interventions
None listed
Sponsors
Vrije Universiteit Medisch Centrum
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: Aged between 18 and 80 years of age, native speakers of Dutch, normal or corrected-to-normal eyesight. Participants should have at least 3 cm long hair at the posterior part of the head. Listeners with hearing loss should have average pure tone hearing thresholds (across 1000, 2000 and 4000 Hz) of at least 35 dB HL in both ears.
Exclusion criteria
Exclusion criteria: Listeners with normal hearing should have age-normal hearing (ISO 7029, 2000). General exclusion criteria: epilepsy, dyslexia or other reading problems, having a history of a neurological, psychiatric, endocrine or cardiovascular diseases or using psychoactive drugs, β blockers, or smoking (> 6 cigarettes per day). The exclusion criteria also include (eye-) diseases such as diabetes mellitus and cataract that may influence the pupil dilation response and pupil light reflex.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The main study parameters include the pupil dilation response during listening to speech, the saliva cortisol and alpha-amylase level during speech perception tests, the long-term cortisol levels in scalp hair and the pupil light reflex. | — |
Secondary
| Measure | Time frame |
|---|---|
| Degree of hearing loss (normal hearing controls), drug use, screening visual abilities - in order to check inclusion criteria. | — |
Countries
Netherlands
Outcome results
None listed