Hearing Tests Pure Tone
Audiometry: Hearing test performed in sound proof room. The softest level at which the sounds can be heard is recorded.
Tympanometry: Test that involves placing a gently pressure probe in the ear. This test helps to assess pressure in middle ear and thus help to detect different conditions that affects the middle ear.
Oto Acoustic Emissions (OAE): OAE’s helps to assess the functional integrity of outer hair cells in the inner ear. Thus OAE’s will be absent in individuals with problems in outer hair cell functioning. It is an important test in assessing hearing in small children and difficult to test population (MR, Autism, etc)
Site Of Lesion Testing
Site of lesion test helps in
Comparing hearing in one ear with the other
Detecting small changes in signal intensity
Ability to hear in the presence of noise.
Testing ability to hear sentences placed in both ears at the same time.
BERA ( Brain Stem Evoked Response Audiometry)
Involves sophisticated computerized equipment sounds are placed in the ear and brinstem response is recorded from electrodes that are taped in patients head.
Helps to distinguish sensory (Inner ear) from neural (nerve) causes of hearing loss
Helps to localize problems in the brainstem auditory pathway
Ability to hear soft sounds in selected area.
Other types of testing
A person experiencing ear noise (tinnitus) can be tested in several ways
Helps to determine whether it can be suppressed / masked by measuring the frequency and intensity of tinnitus
Remedial Measures / Rehabilitation
Conductive hearing loss can be determined with the help of otolaryngologist, neurotologist and auidologist.
Sensory Neural hearing loss: Many types of SNHL can be treated medically.
Surgery is not effective in returning normal hearing.
Hearing aids are beneficial for most patients.
Hearing aids should be custom fitted depending on each individual’s hearing needs.
New technology including implant able hearing aids and cochlear implantation are available for patients who do not do well with hearing aids.
Loss: Require combination of treatment including surgery
/ hearing aids. Devices that convert sound to skin
sensations are some time useful when hearing aid fil to
provide and benefit.
Other Hearing Assistive Devices
monitoring telephones, door bells and alarms.