Hearing Loss Tests
Hearing loss can lead to significant difficulties with understanding speech and language, academic performance, and emotional challenges. Early identification of hearing loss can reduce these effects.1 Hearing can be evaluated at any age. There are two main types of testing: objective and behavioral.
Two to three in 1000 children are born with a significant hearing loss.2
Objective Hearing Tests
Objective hearing tests are performed whenever reliable responses cannot be obtained through behavioral testing due to developmental age or cognitive delays. Behavioral testing is typically used with older infants and small children. There are two types of common objective hearing tests: Otoacoustic emissions (OAEs) and auditory brainstem response (ABR). Either of these may have been done in the hospital after your child was born as his or her newborn hearing screen.
- Otoacoustic emissions are sounds recorded from the ear. The tester puts a small probe in the ear and the child hears a series of sounds. The test equipment records the response from the ear without the child having to respond. An abnormal otoacoustic emissions test could indicate either a hearing loss or perhaps fluid in the ear (such as an ear infection).
- When OAEs are absent, further investigation is warranted due to variables that can impact the accuracy of testing. Auditory brainstem responses record the neural response to sound. Recording electrodes are placed on the child’s head and a sound is played in the ears. The audiologist records the entry-level brain response to this sound and can provide an estimate of the child’s hearing loss
It is important to remember that objective hearing tests do not tell audiologists what the child hears but confirms that the pathways needed to understand sound are functioning. Assuming normal development, once a child is old enough, he or she will be tested using behavioral tests.
Behavioral Hearing Tests
Once a child is approximately six months old, the audiologist will start to introduce behavioral testing. There are different types of tests based on the age and capabilities of the child.
- Visual reinforcement audiometry (VRA) is typically used for children ranging from six months to two years of age. The child is conditioned to turn toward a reward (puppet, video) when he or she hears a sound.
- Conditioned play audiometry (CPA) is used for children between two and five years of age. The child is taught to play a listening game such as putting a block in a bucket when he or she hears a sound.
- Conventional audiometry is used for children 5 and older. The child is asked to raise his or her hand, push a button, or say “I hear it” when he or she hears a sound.
Children with suspected hearing loss should be evaluated as soon as possible. Audiologists can provide reliable information about hearing loss for children of any age.
Role of Audiologists
Audiologists identify, diagnose, and provide treatment options for patients of any age with hearing loss. They work closely with physicians, when necessary, and are an important part of the management team.
Do you think your child may have a hearing loss? Find an audiologist here.
1Ching TYC et al. (2017) Age at intervention for permanent hearing loss and 5-year language outcomes. Pediatrics140(3):e20164274.
2Centers for Disease Control and Prevention (CDC). (2010) Identifying infants with hearing loss – United States, 1999-2007. MMWR Morb Mortal Wkly Rep 59(8):220-223.