Audiology and Speech Disorders Practice Questions

Q: Cochlear implants are primarily indicated for which of the following conditions?

Sensorineural deafness. ***Sensorineural deafness*** - **Cochlear implants** are prosthetic devices that electrically stimulate the **auditory nerve**, bypassing damaged hair cells in the **cochlea**. - They are primarily indicated for individuals with **severe to profound sensorineural hearing loss** who do not benefit adequately from conventional hearing aids. - This is the gold standard indication for cochlear implantation in both adults and children. *Conductive deafness* - **Conductive hearing loss** occurs when sound waves cannot reach the inner ear due to problems in the outer or middle ear (e.g., **otosclerosis**, **perforated eardrum**). - This type of hearing loss is typically treatable with **hearing aids**, surgery, or bone-anchored hearing systems, as the inner ear and auditory nerve are still functional. *Mixed deafness* - **Mixed hearing loss** involves elements of both **conductive** and **sensorineural hearing loss**. - While a profound sensorineural component might eventually warrant a cochlear implant, initial treatment often focuses on addressing the conductive component first, or using hearing aids for both aspects. - Not the **primary** indication for cochlear implants. *Absent pinna* - An **absent pinna** (microtia or anotia) represents a developmental anomaly of the external ear, primarily affecting **cosmetics** and potentially causing **conductive hearing loss** if the ear canal or middle ear structures are also affected. - It does not indicate the need for a **cochlear implant**, as the inner ear and auditory nerve may be perfectly healthy.

Q: Which of the following is used for initial screening of auditory function in a neonate?

Otoacoustic emission (OAE). ***Otoacoustic emission (OAE)*** - **OAE** is the **gold standard for universal newborn hearing screening (UNHS)** programs worldwide due to its **non-invasive nature**, speed, and cost-effectiveness. - The test measures **sound waves produced by the outer hair cells of the cochlea** in response to auditory stimuli, indicating normal cochlear function. - **Quick to perform (2-3 minutes)**, requires minimal cooperation, and can be done while the infant is sleeping. *Auditory brainstem response (ABR)* - While **ABR** is a definitive diagnostic test for hearing loss, it is typically used as a **second-stage test** if an OAE screening fails, rather than the initial screening tool. - ABR measures the **brain's response to sound**, providing information about the neural pathway from the cochlea to the brainstem. - More **time-consuming and expensive** than OAE, making it less suitable for mass screening. *Pure tone audiometry (PTA)* - **PTA** requires active participation and understanding of instructions, making it **unsuitable for neonates** and young children. - This test is primarily used for **older children (typically >4 years) and adults** to determine hearing thresholds across various frequencies. *Free field audiometry* - **Free field audiometry** involves presenting sounds through loudspeakers to assess hearing, but it is **not suitable for precise threshold determination** in neonates due to their inability to localize sounds reliably or respond consistently. - It's mainly used for behavioral observation audiometry in older infants (6-24 months), but **not as a primary screening method** for neonates.

Q: Which of the following statements about Bone Anchored Hearing Aids (BAHA) is true?

It is useful in patients with canal atresia and microtia.. ***It is useful in patients with canal atresia and microtia.*** - BAHA operates by **bone conduction**, bypassing the external auditory canal and middle ear structures. - This makes it an ideal solution for conductive hearing loss caused by malformations like **canal atresia** and **microtia**, where air conduction is impaired. - BAHA is particularly effective when the cochlea is functional but sound cannot reach it via normal air conduction pathways. *It transmits sound through air conduction, making it ideal for sensorineural hearing loss.* - This statement is incorrect on both counts. - BAHA uses **bone conduction**, not air conduction. - BAHA is primarily indicated for **conductive or mixed hearing loss**, not sensorineural hearing loss, as it requires a functional cochlea. *It is used after surgery for acoustic neuroma in neurofibromatosis type 2.* - After acoustic neuroma surgery, especially in Neurofibromatosis type 2, the primary concern is often **unilateral sensorineural hearing loss** or **single-sided deafness**. - While BAHA can be used for single-sided deafness, the first-line option for single-sided deafness is **Cochlear Implants (CIs)** or contralateral routing of signal (CROS) hearing aids. *It is beneficial for patients with bilateral severe sensorineural hearing loss.* - For **bilateral severe sensorineural hearing loss**, the primary intervention is typically **cochlear implantation**, not BAHA. - BAHA is less effective for severe sensorineural loss because it still relies on a functional cochlea to convert bone-conducted vibrations into neural signals.

Q: In infants, what is the most sensitive audiometric screening method?

BERA. ***BERA*** - **Brainstem Evoked Response Audiometry (BERA)** is widely considered the most sensitive audiometric screening method for infants because it directly measures the electrical activity of the auditory pathway from the cochlea to the brainstem. - It can identify hearing loss even in unresponsive infants or those who cannot cooperate with behavioral audiometry. *Electrocochleography* - **Electrocochleography (ECoG)** measures electrical potentials generated by the cochlea and auditory nerve. - While very specific for Ménière's disease and assessing cochlear function, it is generally less commonly used as a primary screening tool for general hearing loss in infants compared to BERA due to its more invasive nature (requiring an electrode near the tympanic membrane). *Cochlear evoked response* - This term is somewhat general and can refer to several tests, including **otoacoustic emissions (OAEs)** or the initial parts of BERA. - While OAEs are a good screening tool to assess outer hair cell function, they are not as comprehensive as BERA in evaluating the entire auditory pathway and can miss neural hearing loss. *Tympanometry* - **Tympanometry** assesses the function of the middle ear, including the eardrum and ossicles. - It is crucial for detecting middle ear pathologies like **otitis media with effusion**, but it does not directly measure auditory nerve or brainstem responses to sound and is not a measure of hearing threshold.

Q: What is the typical decibel range for a whispered voice in a clinical setting?

20 - 30 db. ***20 - 30 db*** - A **whispered voice** in a clinical or quiet setting typically falls within this decibel range, which is just above the threshold of normal hearing. - This level is used during the **whisper test** to assess hearing acuity in clinical examinations. *10 db* - This decibel level is extremely quiet, representing sounds like a very faint rustle or barely audible sound. - It is generally considered too low for a **whispered voice** used for clinical communication or testing. *30 - 50 db* - This range corresponds to a **soft conversational voice** or quiet room sounds. - It's louder than a typical **whispered voice** and represents the lower end of normal speech. *60 db* - This level is equivalent to the sound of a **normal conversation** at typical distance. - It is significantly louder than a **whispered voice** and would not be considered in that category.

Q: A patient presents with fullness in the ear and hearing loss. Tympanometry shows a type B curve. What does this indicate?

Middle ear effusion. ***Middle ear effusion*** - A **Type B tympanogram** indicates a stiff, non-compliant middle ear system, typically due to fluid (effusion) filling the middle ear space. - This fluid prevents the eardrum from moving freely, leading to the **flat curve** on the tympanogram and resulting in hearing loss and a sense of fullness. *Normal middle ear function* - **Normal middle ear function** would be indicated by a **Type A tympanogram**, which shows a characteristic peak pressure near 0 daPa and normal compliance. - This type of curve signifies an air-filled middle ear with a mobile tympanic membrane. *Eustachian tube dysfunction* - **Eustachian tube dysfunction** can lead to negative middle ear pressure, often shown as a **Type C tympanogram** (a peak shifted to negative pressure). - While it can precede effusion, a Type B curve specifically suggests the presence of fluid, not just pressure imbalance. *Otosclerosis* - **Otosclerosis** often results in increased stiffness of the ossicular chain, leading to a **Type As (shallow A) tympanogram**. - This curve shows normal middle ear pressure but reduced compliance with a shallow peak because of the fixation of the stapes.

Question 1

Cochlear implants are primarily indicated for which of the following conditions?

Accepted Answer

Sensorineural deafness

Answer

Conductive deafness

Answer

Mixed deafness

Answer

Absent pinna

Question 2

Which of the following is used for initial screening of auditory function in a neonate?

Accepted Answer

Otoacoustic emission (OAE)

Answer

Auditory brainstem response (ABR)

Answer

Pure tone audiometry (PTA)

Answer

Free field audiometry

Question 3

Which of the following statements about Bone Anchored Hearing Aids (BAHA) is true?

Accepted Answer

It is useful in patients with canal atresia and microtia.

Answer

It transmits sound through air conduction, making it ideal for sensorineural hearing loss.

Answer

It is used after surgery for acoustic neuroma in neurofibromatosis type 2.

Answer

It is beneficial for patients with bilateral severe sensorineural hearing loss.

Question 4

In infants, what is the most sensitive audiometric screening method?

Accepted Answer

BERA

Answer

Electrocochleography

Answer

Tympanometry

Answer

Cochlear evoked response

Question 5

What is the typical decibel range for a whispered voice in a clinical setting?

Accepted Answer

20 - 30 db

Answer

10 db

Answer

30 - 50 db

Answer

60 db

Question 6

A patient presents with fullness in the ear and hearing loss. Tympanometry shows a type B curve. What does this indicate?

Accepted Answer

Middle ear effusion

Answer

Normal middle ear function

Answer

Eustachian tube dysfunction

Answer

Otosclerosis

Audiology and Speech Disorders — MCQs

Audiology and Speech Disorders — MCQs

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