Hearing test
If your answer is "yes" to more than two of the following questions, you should have your hearing checked.
Do you have a problem hearing over the telephone?
Do you hear better through one ear than the other when you are on the telephone?
Do you have trouble following the conversation with two or more people talking at the same time?
Do people complain that you turn the TV volume up too high?
Do you have trouble hearing in a noisy background?
Do you have dizziness, pain, or ringing in your ears?
Do you find yourself asking people to repeat themselves?
Do family members or coworkers remark about your missing what has been said?
Do many people you talk to seem to mumble (or not speak clearly)?
Do you misunderstand what others are saying and respond inappropriately?
Do you have trouble understanding the speech of women and children?
Do people get annoyed because you misunderstand what they say?
Can I wait a bit longer to get hearing aids?
It’s tempting to wait, but here are three good reasons not to:
SIGNIA ( Formerly Siemens ) launches
New Technology Hearing Aids
Signia Nx, the world’s most advanced hearing aid platform, provides the industry’s first genuine solution to the own voice issue. It delivers ...
Professor N.D.Rajan, founder of Hearing Foundation of India, was honoured on 1st January, 2015, at the 47rd Annul Convention of Indian Speech...
Prof. N.D.Rajan presenting Prof. R.K.OZA ORATION to the gathering of professionals of Speech and Hearing from all over India and other countries...
PTA: Pure Tone Audiometry
This is a basic test for the adults. This gives information about type and degree of hearing loss.This test has to be done in a sound treated special room / booth. It cannot be done in an ordinary room. In this test various tones are given to person through head phones and a bone vibrator. Minimum hearing level for various frequencies are identified and plotted in a graph , called Audiogram.
Referal Criteria: This is the first test referrd for in hearing assessment for adults. If sufficient information is not obtained in this test, other tests are recommended. For children between 3 and 5 years, the same test may be done with slight modifications. For children below 3 years, this test can not be done.
Immittance Test
This is also called Impedance Audiometry. In this test, middle ear functions are analysed and measured.This test can be done in an ordinary room. This does not require special sound treated room.This test can be administered in young babies also.This test will be completed within 10 minutes.Usually this test is done in combination with Pure Tone Audiometry.
Referal :Usually refered to identify middle ear problems like blocking sensations, fluid collection in the middle ear, bone fixation etc.
EcochG: Electro CochleoGraphy
It is a test to record the cochlear potentials through which outer hair cell, functions can also be inferred. This helps in differential diagnosis of the active mennier’s disease from other conditions.
REFERRAL CRITERIA: Patients with suspected menier’s disease, subjects in whom OHC functions to be assessed when OAEs are absent, intra operative monitoring of VIII nerve function etc.,
BERA: Brainstem Auditory Evoked Potentials
This is a well established test of hearing and site of lesion at the brain stem level. This has a greatest advantage of testing the hearing when the subject is in sleeping state. It is an easy procedure of threshold estimation and auditory brainstem function testing in paediatric, elderly, non co-operative and functional hearing loss subjects.
REFERRAL CRITERIA: Paediatric hearing threshold estimation, suspected subjects with brain stem lesion, differential diagnosis of the cochlea and retro cochlear pathologies, non co-operative subjects for conventional audiometry and subjects with functional hearing loss etc.,
ASSR: Auditory Steady State Responses
Auditory steady- state response (ASSR) audiometry is a new, commercially available clinical tool that measures far-field electrical potentials in response to amplitude/frequency modulator, frequency-specific auditory stimuli. So it is possible to get frequency specific threshold as it is in pure tone audiogram.This test is not affected by sleep.
REFERRAL CRITERIA: paediatric hearing threshold estimation, non co-operative subjects for conventional audiometry and subjects with functional hearing loss etc.,
VEMP: Vestibular Evoked Myogenic Potentials
VEMP is the only test to check for utricle, saccule, inferior vestibular nerve, inferior vestibular nuclei and vestibulo spinal tract function. Vertigo can be induced by the lesion at utricle and saccule also. So it becomes unavoidable to test these regions also in assessment of vertigo and also to rule out utricle and saccule pathology in other vestibular pathologies.
REFERRAL CRITERIA: subjects with vertigo and other vestibular symptoms.
OAE: Oto Acoustic Emissions
This is a dedicated test to asses outer hair cell function. Assessment of OHC function is essential in diagnosis of the retro cochlear pathologies, confirmationof cochlear pathologies, neo natal hearing screening procedure, etc.,
REFERRAL CRITERIA: paediatric hearing screening, suspected retro cochlear pathologies, suspected auditory maturational delay, oto toxicity, noise induced hearing loss, intra operative monitoring of OHC function, progressive hearing loss and functional hearing loss etc.,
Cognitive Potentials
Tests like MLR, LLR and FFR helps to assess different aspects of auditory signal processing at various levels from auditory brainstem to the auditory cortex. These tests can be used to assess or confirm certain aspects of processing especially when there is a delay in speech and language development.