Pediatric Hearing Tests
Hearing loss can affect those of all ages, including children. Diagnosing and treating hearing loss in the pediatric population requires different instruments than those used on adults. Children may also suffer from different disorders.
Newborn Hearing Tests
To test the hearing of newborns and infants, subjective tests must be used, as newborns are unable to articulate what they can and cannot hear. Auditory Brainstem Response (ABR) provides information on how well a child’s cochlea and neural pathway is functioning. Electrodes are placed on and around their head to measure their brainwave activity in response to sounds.
Otoacoustic Emissions (OAEs) are the barely audible sounds given off by the hairs lining the cochlea. A small probe is placed into the ear and a sound is played to elicit the release of OAEs. If no OAES are detected, this could mean there is a blockage in the ear canal, fluid in the middle ear or damage to the hair cells within the cochlea.
How Are Hearing Tests for Kids Performed?
For slightly older children, visual response audiometry and conditioned play audiometry can be used. A sound is broadcast through speakers within a specially designed booth. Depending on the child’s age, they are either taught to turn their head toward an animated toy or video (visual response) or drop a block in a bucket (conditioned play) when they hear a sound. These versions of pure-tone testing cannot discern single-sided hearing loss.
Testing Speech in Toddlers
Speech discrimination tests can be performed on children three years of age and older. A series of words is read aloud to the child and they are either asked if they heard the words or they are asked to repeat the words back to the tester. This test may be performed in different environments with different levels of background noise.
Pediatric Ear Infections
Infections of the middle ear are the most common causes of hearing loss of children. An infection is caused by a buildup of fluid within the middle ear. Eustachian tubes are small tubes that connect the middle ear with the back of the throat. These tubes are responsible for regulating pressure and fluid within the middle ear. In children, these tubes are much smaller and sit horizontally, which means they are more likely to get blocked.
Ear Tubes May Provide Long-term Relief
A common solution to middle ear infections in ear tubes. A simple surgery creates a hole in the child’s eardrum, a small tube is place within the hole to keep it open. This hole helps to prevent fluid from building up, preventing future ear infections. After a few months, these tubes usually fall out on their own.
Speech-language milestones help pediatric audiologists identify potential audiological problems by assessing a young child’s communicational development.
What Are Speech-Language Milestones?
Children all learn and develop differently, so it can be difficult to determine whether a baby’s communication abilities are progressing at a normal, healthy rate. Despite huge variations in the process of early childhood development, infants typically follow some universal patterns of speech and hearing growth. Using these patterns, pediatricians can evaluate a child’s development through a set of guidelines called speech-language milestones.
These communication guidelines aren’t just useful for doctors; they’re a helpful tool for parents as well. A basic understanding of speech-language milestones will allow you to assess whether your child’s language development is normal or irregular. Irregular communicational development doesn’t always indicate an auditory impairment; however, any child who shows signs of slow development should get a hearing assessment as soon as possible.
Communication Guidelines for Infants and Toddlers
Some of the most important speech-language milestones for infants and toddlers are listed below. Normally developing children should be able to perform the tasks described by the end of the milestone’s specified age range.
Infants begin producing basic sounds like babbling early in their first year. By their first birthday, they string different multi-tonal sounds together and repeat familiar sounds like mama, dada or baba.
Within the span of a year, a child’s language production should transform from incoherent babbling to recognizable speech. By age two, most children can produce about 50 words and are able to form basic two- or three-word phrases.
During this year, a child’s vocabulary rapidly expands to hundreds of words. By age three, a toddler should be producing basic sentences of at least two or three words. Toddlers with normal hearing will begin engaging in communication with their parents, teachers and peers at this age.
By four, a child’s speech should be complicated and understandable, even to strangers. Children of this age ask questions, use pronouns and tell stories that are a few sentences long.
Infants should respond to loud, familiar or surprising sounds (e.g. music, bangs or thuds, dog barking, their name, whistling, etc.) through actions like movement, eye contact and speech.
During this year, children gain an understanding of the names of familiar objects as well as basic commands. By 24 months, children can typically understand and perform commands with two parts (e.g. touch your ear and wiggle your toes).
During this year, children develop the skill to differentiate between words like “over” and “under.” They also can follow more complicated commands and identify some numbers and colors. Unresponsiveness is common for this age; however, children with normal hearing should still react to loud sounds and give some response when their name is spoken.
At this age, children recognize and respond when their name is called from another room and display a solid understanding of basic language. Your child should also be able to hear TV, movies, games and music at the same volume as adults with normal hearing.
If your child is behind on any of these language development benchmarks, it’s imperative to check for hearing impairment right away. Untreated hearing loss can result in major developmental, behavioral and communication setbacks for young children.
Our pediatric audiologists will take the time to understand your concerns, assess your child’s hearing and develop the best treatment plan for your child’s needs.
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