- Detecting Hearing Loss in Children Center
- Anatomy of an Ear Infection Slideshow Pictures
- Take the Ear Infection Quiz
- Ear Health Quiz
- Patient Comments: Hearing Loss in Children - Diagnosis
- Find a local Pediatrician in your town
- Determining hearing loss in children facts
- Why test a child's hearing?
- What are the causes, risk factors, and signs of hearing loss in children?
- Who tests hearing in children?
- Can very young children have their hearing tested?
- How is hearing tested in an older infant or young child who cannot follow specific instructions?
- How can hearing be assessed in a child who is unable to cooperate?
- Are any additional tests done during a pediatric hearing evaluation?
- What happens when hearing loss is detected? What is the treatment for hearing loss in children?
- What is the latest hearing test being used in children?
Determining hearing loss in children facts
- Children can be tested for hearing loss at any age.
- There are several risk factors associated with hearing loss, including ear infections, prematurity, diseases, and syndromes.
- Early identification of hearing loss will permit effective intervention, allowing for speech, language and cognitive development that are on target with a child's peers.
- The ABR and the OAE evaluations are effective tests for infants and children who cannot cooperate for a traditional hearing evaluation.
- Visual reinforcement audiometry and play audiometry are two behavioral methods used for testing cooperative children, which can obtain results similar to an adult evaluation.
- A test of the middle-ear system should be included in a diagnostic hearing evaluation for all children.
- When a hearing loss is detected, the child should be referred to an otolaryngologist or ENT to identify the cause of the loss. Further recommendations can be made by the ENT.
Accurate hearing testing cannot be done until a child reaches the age of 5 or 6.
Current technology now permits the accurate assessments of hearing in children starting within a few hours of birth. In fact, all states have mandates that testing of hearing be done in the newborn prior to discharge from the hospital.
Quick GuideTinnitus: Why Are My Ears Ringing?
Why test a child's hearing?
A child with undetected hearing loss may not be able to develop normal speech and language or acquire the cognitive abilities (knowing, thinking, and judging) needed for learning. Children whose hearing loss is not identified until, for example, 2 or 3 years of age may suffer from permanent impairment of speech, language, and learning.
The early identification of hearing loss permits the initiation of treatment and rehabilitation of the hearing-impaired child at a very young age. The child can then learn more normal speech skills when hearing loss is identified early and intervention begins.
Hearing loss can range from a mild impairment to profound loss. Many people think that hearing is only graded as normal or deaf. They may also think that the child is hearing normally if he or she is responding to sounds and voices. However, there are many subtle gradations between normal hearing and deafness and a child's hearing loss may not be apparent.
For example, it is common for a child with moderate hearing loss to develop speech and language and yet miss over half of what is being said. A child in this situation will have a distinct disadvantage in development and learning and will often reach a point where advancement stops unless the hearing loss is detected and treatment begins.
The stress on a child with hearing loss (and their family) can be enormous because the child does not understand why it is constant struggle to learn seemingly simple material (and the family is baffled as to why their bright child is not doing well).
The degree of hearing loss often determines the impact it will have on the child throughout life. However, with early identification and treatment, the impact can be lessened.
What are the causes, risk factors, and signs of hearing loss in children?
There are a number of risk factors for hearing loss in children, so there are a number of special reasons why a child's hearing may need to be screened or tested. Common indications for a hearing evaluation include
- speech delay,
- frequent or recurrent ear infections,
- a family history of hearing loss (hearing loss can be inherited),
- syndromes known to be associated with hearing loss (for example, Down syndrome, the Alport syndrome, and Crouzon syndrome),
- infectious diseases that cause hearing loss (for example, meningitis, measles, and cytomegalovirus [CMV] infection),
- medical treatments that may have hearing loss as a side effect, including some antibiotics and some chemotherapy agents,
- poor school performance, and
- diagnosis of a learning disability or other disorder, such as autism or pervasive developmental disorder (PDD).
In addition, the circumstances surrounding the pregnancy and birth may be associated with subsequent hearing loss. If there is a history that includes any of the following, a child should have a hearing assessment.
- low birth weight (less than 2 pounds) and/or prematurity
- assisted ventilation (to help with breathing for more than 10 days after birth)
- low Apgar scores (numbers assigned at birth that reflect the newborn's health status)
- severe jaundice after birth
- maternal illness during pregnancy (for example, German measles [rubella])
Some parents start to suspect that their child cannot hear normally because the child does not respond to his or her name consistently or asks for words, phrases, or sentences to be repeated. Another sign can be that the child does not seem to be paying attention to sounds or to what is being said.
On the average, only half of all children diagnosed with a hearing loss actually have a known risk factor for hearing loss. This means that the cause is never known in about half of children with hearing loss. For this reason, all states in the U.S. have instituted a universal hearing screen so that all babies have their hearing screened before they go home from the newborn nursery.
Quick GuideTinnitus: Why Are My Ears Ringing?
Who tests hearing in children?
A specialist who tests a person's hearing is called an audiologist. An audiologist has an advanced degree (minimum of master's degree) in diagnostic hearing testing techniques and auditory rehabilitation for children and adults. However, because testing hearing in children requires specific equipment, setup, and training, not all audiologists test children. When a child is referred for a hearing evaluation, it should be confirmed at the time of scheduling that the testing audiologist has a pediatric specialty and the appropriate setup to test hearing in children.
Can very young children have their hearing tested?
A child of any age can be tested with the appropriate hearing test. The type of test utilized depends on the child's age in years or developmental level. Some hearing tests require no behavioral response from the child, while other tests utilize games that entice a child's interest. The key is to find the right test method for each child.
How is hearing tested in an older infant or young child who cannot follow specific instructions?
Cooperative and alert infants or young children (ages 5 months to 2 and a half years) are frequently tested using a method called visual reinforcement audiometry (VRA). For this test, the child sits on a caregiver's lap in the center of a room.
Speakers are situated to the child's right and left side. The speakers have toys (usually mounted inside boxes) hung below, which can be animated by the tester. The child is then "conditioned" to turn his or her head toward the side from which the sound is presented. When the child turns to the correct side, the toy is lit up, providing positive reinforcement that encourages the child to continue participating in the task. Children (and adults) will instinctively turn toward a novel sound without having to think about the response, which is why this test is effective for children as young as 5 months of age. This method can also be used with small insert earphones, which allow the hearing of each ear to be tested individually. Below is a diagram of the setup for the VRA test.
There are, however, some limitations to the VRA test. For an accurate test, the child must participate and needs to be cooperative and alert. Additionally, if only speakers are used for testing, the results can only be used to predict hearing for the "better" ear. There is no way to tell if both ears are hearing the test sounds, or if only one ear is hearing all of the sounds, unless a device is utilized to isolate the ears (for example, earphones). It is not unusual, however, to achieve test results for individual ear information by having the child wear earphones during portions of the VRA test. The ability to localize sound even with one impaired ear can be quite good. Often, otoacoustic emission (OAE) tests are completed in conjunction with VRA testing to obtain some ear-specific results (OAE tests will be discussed later in this article).
Children 3-5 years of age who are capable of more complicated tasks are often tested using a technique called play audiometry, in which sounds are paired with a specific response or task. For example, a child is taught to hold a peg next to his or her cheek. When the child hears the sound, the child places the peg on a Peg-Board.
Speech testing can be completed using pictures, for example, the child points to the correct picture as the tester's voice is presented at softer and softer levels. Once again, the child needs to be a willing participant. The advantage of this format is that results obtained are often as detailed as an adult test session.
How can hearing be assessed in a child who is unable to cooperate?
Some children are unable to cooperate for hearing evaluations, either due to their age or to a developmental delay (for example, a child with severe mental retardation). Currently, there are two different types of tests that are utilized for children who are unable to cooperate. The first is the frequency-specific auditory brainstem response (ABR) evaluation. An ABR is a physiological measure of the brainstem's response to sound. It tests the integrity of the hearing system from the ear to the brainstem. The test is performed by placing four to five electrodes on the child's head, after which a variety of sounds are presented to the child through small earphones. As the hearing nerve fires, the sound stimulus travels up to the brain. The electrical activity generated by the nerve can be recorded by the electrodes and presented as waveforms on a computer screen. The audiologist can then present different loudness levels of each sound and determine the softest levels at which the child can hear. The child can be tested using all the sounds of a conventional hearing evaluation (adult hearing evaluation).
The limitation of the ABR is the need for the child to be quiet and still. The electrical potential the computer is recording from the auditory nerve is very small. Any muscle movement, including something as small as an eye blink, can obliterate the hearing response; therefore, the infant or child must be sleeping during the test. Infants less than 3 months old can be tested during natural sleep. Children older than 3 months are typically sedated for about one hour (under the supervision of a physician) during the test. The most common oral sedative used is chloral hydrate.
The second type of test to objectively evaluate children is the otoacoustic emission (OAE) test. This test can be done as a supplement to the ABR or as an initial screen of hearing. An otoacoustic emission test measures an acoustic response produced by the inner ear (cochlea). The acoustic response measured is in essence the response produced by the inner ear as it bounces back out of the ear in response to a sound stimulus. The test is performed by placing a small probe that contains a microphone and speaker into the child's ear.
As the child sits or rests quietly, sounds are generated in the probe and responses that come back from the cochlea are recorded. Once the cochlea processes the sound, an electrical stimulus is sent to the brainstem. In addition, there is a second and separate sound that does not travel up the nerve but comes back out into the child's ear canal. This "byproduct" is the otoacoustic emission. The emission is then recorded with the microphone probe and represented pictorially on a computer screen. The audiologist can tell which sounds yielded a response/emission and the strength of those responses. If there is an emission present for those sounds critical to speech comprehension, then the child has "passed" the hearing screen. As a supplement to the ABR, the OAE serves as a crosscheck to either confirm normal hearing or verify the site-of-lesion for the hearing loss as the inner ear. OAE tests the integrity of the hearing organ for sound (the cochlea), but it does not evaluate the hearing beyond the cochlea. That is why the OAE is often paired with the ABR or with a behavioral test that can evaluate a child's responsiveness to sound.
The results from an ABR and an OAE evaluation can predict the child's hearing, determine if there is a loss, determine the type of hearing loss, and help with decisions regarding intervention. Intervention can include medical treatment, surgery, or hearing aids and therapy.
Quick GuideTinnitus: Why Are My Ears Ringing?
Are any additional tests done during a pediatric hearing evaluation?
A thorough diagnostic test also includes an evaluation of the middle-ear system. The middle ear is the space behind the eardrum and is a common site for ear infections in children.
A tympanogram is a measure of the compliance of the middle-ear system mobility (including the eardrum) and is an objective method for confirming abnormalities of the eardrum or middle ear space, such as
- fluid behind the eardrum,
- a hole or perforation of the eardrum, or
- stiffness of eardrum or middle-ear bones (for example, otosclerosis).
The tympanogram is completed by inserting a probe in the ear and creating a vacuum-tight seal. The air pressure is changed in the ear canal from positive to negative, and the movement of the eardrum is recorded. The amount and shape of the movement can either exclude or signify different problems, as previously listed. The test is fast, objective, and is not painful (although sometimes the insertion of the probe may upset children).
When a loud sound is presented to a healthy ear, the eardrum will contract, a sort of built-in hearing protection mechanism (although it's not very effective). This contraction of the eardrum is called the acoustic reflex. The absence of this reflex can further confirm problems of the middle ear or may help to identify or confirm a hearing loss. Acoustic reflexes are typically evaluated concurrent with the tympanogram.
Many general pediatricians perform this test in their offices as a screening test and to aid in the diagnosis of ear infections or effusions (fluid in the middle ear space).
What happens when hearing loss is detected? What is the treatment for hearing loss in children?
When hearing loss is identified, a thorough search for its cause must be undertaken. In many situations, the hearing loss can be attributed to an ear infection or to fluid trapped in the middle-ear space. In this situation, the pediatrician can often prescribe antibiotics to treat the infection. If the infection is persistent, or the hearing loss is still present after treatment of the infection, then the child should be referred to a medical doctor who specializes in diseases of the ear and auditory system (an otolaryngologist or ENT). The otolaryngologist will often administer further testing, and in some situations, he or she may recommend additional therapy such as surgery (ear tubes). If the hearing loss is persistent or is related to a nerve or inner-ear problem, the otolaryngologist will often recommend an evaluation by an audiologist for hearing aids and rehabilitative therapy (which includes speech therapy and social integration of the hearing-impaired child).
What is the latest hearing test being used in children?
One of the newest tests being utilized is the auditory steady state response (ASSR) evaluation. This is a test that is used in conjunction with the ABR. It is completed while the child is sleeping, or sedated, and it makes recordings from the auditory nerve as the response travels up to the brainstem. The generators for this test are commonly accepted to be similar to those of the ABR. One advantage of ASSR is that the stimuli used to test the child's hearing are more frequency-specific, which allows the audiologist to predict hearing levels for a wide range of sounds with increased accuracy. In addition, the ASSR is faster and has the ability to test at levels somewhat louder than the ABR (due to equipment limitations of the ABR), making the distinction between severe and profound losses more clear. It should be noted, however, that results for a mild hearing loss and normal hearing are indistinguishable from each other, so there is potential for a misdiagnosis for children with mild hearing loss.
Medically reviewed by Margaret Walsh, MD; American Board of Pediatrics
Adcock, Lisa M., MD, et al. "Screening the newborn for hearing loss." UptoDate. Updated Jul 21, 2016.
Daily Health News
Subscribe to MedicineNet's General Health Newsletter
Adcock, Lisa M., MD, et al. "Screening the newborn for hearing loss." UptoDate. Updated Jul 21, 2016.
Hearing Loss in Children - Diagnosis
How did you first notice your child may have hearing problems?Post View 1 Comment
Hearing Loss in Children - Diagnosis
How did you first notice your child may have hearing problems?Post
Hearing Loss - Treatment
Please explain how doctors treated your child's hearing loss.Post
Top Detecting Hearing Loss in Children Related Articles
Apgar ScoreThe Apgar score is a method for assessing a neonate's heart rate, respiratory effort, muscle tone, skin color, and reflex irritability. Each of these signs is give a point value from 0-2. A perfect score of 10 means the infant is in excellent condition, while a score of 0-3 means the infant needs immediate resuscitation.
Autism Screening and DiagnosisAutism spectrum disorder (ASD) diagnosis requires two steps -- developmental screening and comprehensive diagnostic evaluation. Develpmental screening helps tell if children have delays. Comprehensive diagnostic evaulation may include looking at the child's behavior and development and interviewing the parents. It may also include hearing and vision screening, genetic testing, neurological testing, and other medical testing.
Middle ear infection or inflammation (otitis media) is inflammation of the middle ear. There are two forms of this type of ear infection, acute and chronic. Acute otitis media is generally short in duration, and chronic otitis media generally lasts several weeks. Seventy-five percent of children in the U.S. suffer from otitis media at some point.
Signs and symptoms in babies, toddlers, and children may:
- Be irritable and pull and tug at their ears
- Be fussy
- Have problems feeding or sleeping
- Complain about pain and fullness in the ear
- Have a fever
- A buildup of pus in the ear
- Have signs and symptoms of an upper respiratory infection
Treatment depends upon the type (chronic or acute).
Ear TubesWhen a child has repeated middle ear infections or fluid build-up in the ears, which causes problems with speech or hearing, surgery to place tubes inside the ear is often recommended. The surgery is called myringotomy. Preparing your child for this procedure will help comfort them, and knowing what to expect before, during, and after surgery is important as well.
Earwax (ear wax) is a natural substance secreted by special glands in the skin on the outer part of the ear canal. It repels water, and traps dust and sand particles. Usually a small amount of wax accumulates, dries up, and then falls out of the ear canal carrying with it unwanted particles. Under ideal circumstances, you should never have to clean your ear canals. The absence of ear wax may result in dry, itchy ears, and even infection. Ear wax may accumulate in the ear for a variety of reasons including; narrowing of the ear canal, production of less ear wax due to aging, or an overproduction of ear wax in response to trauma or blockage within the ear canal.
HydrocephalusHydrocephalus is an abnormal buildup of cerebrospinal fluid (CSF) in the ventricles of the brain. The fluid is often under increased pressure and can compress and damage the brain. Symptoms of hydrocephalus vary with age, progression of the disease, and individual tolerance to the condition. Hydrocephalus is most often treated by surgery in which a shunt system is inserted.
Jaundice in Adults
Jaundice (hyperbilirubinemia) in adults may be caused by a variety of medical diseases or conditions. Some cases of jaundice can be managed at home with a doctor's supervision, while other causes of jaundice may be life-threatening. Symptoms of jaundice are:
- Yellow skin
- Yellowing of the whites of the eyes
- Pale colored stools
- Dark urine
- Itchy skin
- Rectal bleeding
Treatment of jaundice is focused on the disease or condition that is causing jaundice.
Newborn Infant Hearing ScreeningA newborn infant hearing screening is performed before a child is discharged from the hospital. If an infant doesn't pass the test, a rescreen is performed. Detecting hearing loss at an early age increases a child's chance of having a healthy and more productive life. There are two methods of testing hearing in infants: auditory brainstem response (ABR) and otoacoustic emission (OAE). Both tests are accurate, automated, and don't require a visible response from the infant.
Swimmer's ear (external otitis) is an infection of the skin that covers the outer ear canal. Causes of swimmer's ear include excessive water exposure that leads to trapped bacteria in the ear canal. Symptoms include a feeling of fullness in the ear, itching, and ear pain. Chronic swimmer's ear may be caused by
- chronic irritation, and
- other conditions.
Common treatment includes antibiotic ear drops.
Signs and symptoms of pregnancy vary by stage (trimester). The earliest pregnancy symptom is typically a missed period, but others include
breast swelling and tenderness,
- nausea and sometimes vomiting,
- fatigue, and
Second trimester symptoms include
- weight gain,
- itching, and
- possible stretch marks.
Third trimester symptoms are
- additional weight gain,
- swelling of the ankles,
- fingers, and face,
- breast tenderness, and
- trouble sleeping.
Eating a healthy diet, getting a moderate amount of exercise, also are recommended for a healthy pregnancy. Information about the week by week growth of your baby in the womb are provided.