We use a multi - disciplinary approach to evaluate children. The professionals we work with may include pediatricians, otolaryngologists (ear, nose and throat physicians), speech pathologists, educators, behavioral specialists, occupational therapists, and most importantly parents!
No child is too young for a hearing test! Infants are now routinely screened for potential hearing loss before they leave the hospital. The type of test used to assess a child's hearing status depends on the age and cognitive function of the child. Infants are tested in two ways :
Behaviorally and/or Electrophysiologically
- Behavioral Observation Assessment (BOA) testing is conducted by an audiologist specially trained to detect bodily reactions to sound i.e. cessation of activity, body movement, eye widening, eye opening, or change in sucking rate.
- The Auditory Brainstem Response (BERA), an electrophysiologic test of hearing which is done on infants /young children and unresponsive patients. It involves attaching (small, disk-like )electrodes to the head,forehead and behind each ears to record electrical activity from the hearing nerve and other parts of brain and positioning small foam-tipped earphones in the ears for delivery of sounds.It requires the patients to sleep. For that purpose,children are sedated, usually with oral medication. It is a painless and harmless test.This test is performed in a semi-dark, soundproof room. Your child may be held in your arms or will be laying on a cot during testing. The test will be administered by a certified clinical audiologist. Parent/Guardian must be prepared to spend at least one-half day at the clinic for purposes of this test.
As children mature, so does their ability to respond to sound. At approximately six to seven months of age, normally-developing children are able to turn toward a sound source. Children at this level are tested either using earphones or in the sound booth without earphones but using speakers. Sounds used for testing typically include low pitch to high pitch tones that are included in the speech range. Turning toward the sound source is reinforced with a lighted toy. This type of testing is called Visual Reinforcement Audiometry (VRA) and is generally quite accurate in determining hearing levels.
By approximately 2 1/2 - 3 years of age most children can be tested using a technique called Conditioned Play Audiometry which is an ear-specific and frequency specific hearing test obtained in a sound-treated room. Earphones are placed on the child and the child is shown how to perform a repetitive play task, such as placing a peg in a pegboard, each time he or she hears a sound.The child is taught to wait, listen, and respond.
Traditional Puretone Audiometry (PTA) is used with older children and adults. It is the key hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss. Thus, providing the basis for diagnosis and management.This method requires the patient to press a response button or raise a hand when the test tone is heard. Hearing sensitivity is plotted on an audiogram, which is a graph displaying intensity as a function of frequency. It's quick(15-20mins), painless, and accurate test.
Tympanometry or Acoustic Immittance Testing is often an integral part of the test battery. This test is used to assess the status of the middle ear and related structures. Tympanometry measures the movement of the ear drum (tympanic membrane). This information is used in the diagnosis of middle ear disease or other problems that might restrict ear drum movement. Testing of ETF(Eustachian Tube Function) and patency is also carried out through Tympanometry. Valsalva test and Toynbee tests are also carried out to check eustachian tube functioning.
Acoustic reflexes are measured in order to determine whether the middle ear muscles are properly reacting to loud sounds. This test can also be used to assist in testing of hearing in young children and/or to identify other otologic problems.
Bone Conduction BERA : With BC ABR we can also test patients with congential External and Middle malformations. Additional use of BC BERA with AC BERA can also indicate type of Hearing loss. This test not only confirm a conductive loss but also helps to calculate the amount of hearing loss due to the conductive component.
Otoacoustic Emissions (OAEs : DPOAEs & TEOAEs) - Otoacoustic Emissions (OAE) are inaudible sounds emitted by the cochlea when the cochlea is stimulated by a sound. When sound stimulates the cochlea, the outer hair cells vibrate. The vibration produces an inaudible sound that echoes back into the middle ear. The sound can be measured with a small probe inserted into the ear canal. Persons with normal hearing produce emissions. Those with hearing loss greater than 25-30 dB do not. OAEs can detect blockage in the outer ear canal, middle ear fluid, and damage to the outer hair cells in the cochlea.
Widex Hearing Aid in Delhi provide help and assistance for hearing care delivery system with utmost professional and compassionate care. Widex Hearing Aid is the safest hearing aid with the largest sale in India. Audiologists from Widex hearing Aid will take proper care of each customer purchasing the product.