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DHA Audiologist Assistant Practice Tests & Test Prep by Exam Edge - Review


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DHA Audiology Assistant - Reviews


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Based on 140 reviews

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See why our users from 154 countries love us for their exam prep! Including 140 reviews for the DHA Audiology Assistant exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 140 reviews

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DHA Audiology Assistant - Test Reviews Sample Questions

Immittance (tympanometry; acoustic reflex thresholds) is used in children ____.

Correct Answer:
of all ages.


immittance testing, which encompasses tympanometry and acoustic reflex thresholds, is a fundamental part of audiological assessments used to evaluate the integrity of the middle ear system. this type of testing is crucial for detecting issues such as fluid in the middle ear, eustachian tube dysfunction, and otosclerosis, among other conditions. it is used in individuals of all ages, from newborns to the elderly, making it a versatile tool in both pediatric and adult audiology.

for children under 6 months of age, immittance testing uses a higher frequency probe tone, typically either 678 hz or 1000 hz. the reason for using a higher frequency probe tone in this age group is related to the physical characteristics of the ear in infants. young infants have more compliant ear canal walls, which can affect the movement of the tympanic membrane in response to sound. higher frequency tones provide more reliable and accurate measurements in such compliant ears, leading to better diagnostic outcomes.

conversely, for children 6 months of age and older, as well as adults, a standard 226 hz probe tone is typically used. by this age, the physical structure of the ear canal and the middle ear has matured enough to respond effectively to the lower frequency probe tone, which yields accurate assessments of middle ear function in older children and adults.

the choice of probe tone frequency for immittance testing is thus guided by the age-related anatomical and physiological characteristics of the ear. this tailored approach helps clinicians obtain the most accurate and clinically useful information, thereby aiding in the effective diagnosis and management of various auditory and middle ear conditions across different age groups.

DFNA9 is a mutation of ____.

Correct Answer:
coch.
dfna9 is a mutation of the coch gene.

the coch gene, which stands for cochlin, is expressed primarily in the inner ear structures known as the cochlea and vestibular labyrinth. these areas are crucial for hearing and balance, respectively. the protein cochlin produced by the coch gene plays a significant role in the structural integrity and function of these sensory organs.

when a mutation occurs in the coch gene, it leads to the production of an abnormal cochlin protein, which adversely affects the normal functioning of the cochlea and vestibular labyrinth. this disruption can lead to symptoms of hearing loss and balance disorders, which are characteristic of dfna9.

dfna9 is a type of nonsyndromic hearing loss, meaning it occurs without other signs and symptoms affecting different parts of the body. it is known for its late onset, typically affecting individuals in adulthood, and can progressively worsen over time. in addition to hearing impairment, some affected individuals might experience problems with balance due to vestibular dysfunction.

understanding the genetic basis of dfna9, such as the mutation in the coch gene, is crucial for genetic counseling and potential future therapies that could target the underlying causes of the associated auditory and vestibular dysfunctions.