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DC HEALTH | BOARD OF AUDIOLOGY AND SPEECH-LANGUAGE PATHOLOGY
Hearing Aid Dispenser | Professional Licensure
DC — Hearing Aid Dispenser License Exam
District of Columbia Hearing Aid Dispenser License Examination
INSTITUTION DC Health | Board of Audiology and Speech-Language Pathology
PROGRAM Hearing Aid Dispenser Licensure
EXAM TITLE DC HEARING AID DISPENSER EXAM 2026/2027 | Verified Questions
COURSE TITLE District of Columbia Hearing Aid Dispenser License Examination
COURSE CODE DC-HAD
ACADEMIC YEAR 2026/2027
TOTAL QUESTIONS 150 Questions
Core Domains: Auditory Anatomy and Physiology • Hearing and Audiometric Assessment • Hearing Aid Technology and Selection • Fitting,
Verification, and Validation • Troubleshooting and Repair • Professional Standards and Ethics
Current Hearing Aid Dispenser Professional Focus
Multiple-Choice • Scenario Analysis • Applied Audiology Reasoning Format
2026/2027 Edition — Aligned with the DC Health Board of Audiology Hearing Aid Dispenser License Examination, DC Municipal Regulations, ANSI
Standards for hearing aid testing, and evidence-based audiology standards
CONTENTS
Domain Content Area Questions
Domain 1 Auditory Anatomy and Physiology 24
Domain 2 Hearing and Audiometric Assessment 30
Domain 3 Hearing Aid Technology and Selection 30
Domain 4 Fitting, Verification, and Validation 30
Domain 5 Troubleshooting and Repair 18
Domain 6 Professional Standards and Ethics 18
TOTAL All Domains 150
© BestSellerStuvia
Academic Year 2026/2027
DC-HAD | 2026/2027
ACTUAL QUESTIONS
Domain 1: Auditory Anatomy and Physiology
Question 1. Where is the organ of Corti located?
A. Within the cochlea, on the basilar membrane
B. In the middle ear cavity
C. In the external auditory canal
D. In the semicircular canals
Correct Answer: A
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
, © BestSellerStuvia |
Rationale: The organ of Corti, containing the sensory hair cells, rests on the basilar membrane inside the cochlea.
Question 2. What is the primary function of the outer hair cells?
A. To transmit signals directly to the auditory nerve only
B. To detect angular acceleration
C. To amplify and fine-tune cochlear mechanics, enhancing sensitivity and frequency selectivity
D. To equalize middle-ear pressure
Correct Answer: C
Rationale: Outer hair cells act as a cochlear amplifier, improving hearing sensitivity and frequency resolution.
Question 3. Which structure converts mechanical vibrations into electrical nerve impulses?
A. The hair cells of the organ of Corti
B. The tympanic membrane
C. The ossicles
D. The pinna
Correct Answer: A
Rationale: Hair-cell stereocilia deflection opens ion channels, generating receptor potentials that trigger neural firing.
Question 4. What type of hearing loss results from damage to the cochlea or auditory nerve?
A. Conductive hearing loss
B. Sensorineural hearing loss
C. Mixed hearing loss only when both are equal
D. Central auditory processing disorder exclusively
Correct Answer: B
Rationale: Sensorineural loss involves the inner ear or neural pathway and is the type most often managed with hearing aids.
Question 5. What is the function of the Eustachian tube?
A. To amplify sound
B. To house the organ of Corti
C. To equalize air pressure between the middle ear and the nasopharynx
D. To generate otoacoustic emissions
Correct Answer: C
Rationale: The Eustachian tube ventilates the middle ear and equalizes pressure across the tympanic membrane.
Question 6. Which frequency range is most critical for speech understanding?
A. 125–250 Hz only
B. 8,000–12,000 Hz only
C. Below 100 Hz
D. Approximately 500–4,000 Hz
Correct Answer: D
Rationale: The speech frequencies, especially the consonant region around 1–4 kHz, are essential for intelligibility.
Question 7. What does the tympanic membrane do?
A. Vibrates in response to sound waves and transmits energy to the ossicular chain
B. Generates neural impulses
C. Produces cerumen
D. Houses the stapedius muscle only
Correct Answer: A
Rationale: The eardrum converts acoustic energy into mechanical vibration of the middle-ear bones.
Question 8. Which ossicle is attached to the oval window?
A. Malleus
B. Stapes
C. Incus
D. None of the ossicles
Correct Answer: B
Rationale: The stapes footplate sits in the oval window, transmitting energy into the cochlear fluids.
Question 9. What is the primary role of the pinna (auricle)?
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
, © BestSellerStuvia |
A. To house the cochlea
B. To equalize pressure
C. To collect and funnel sound into the external auditory canal and provide localization cues
D. To produce endolymph
Correct Answer: C
Rationale: The pinna gathers sound and contributes to vertical localization and high-frequency amplification.
Question 10. Damage limited to the outer or middle ear typically produces which type of loss?
A. Sensorineural
B. Retrocochlear only
C. Central only
D. Conductive
Correct Answer: D
Rationale: Conductive loss results from impaired transmission of sound to the inner ear.
Question 11. What fluid fills the scala media?
A. Endolymph
B. Perilymph
C. Cerebrospinal fluid
D. Blood
Correct Answer: A
Rationale: Endolymph, high in potassium, bathes the organ of Corti within the cochlear duct.
Question 12. What is the function of the stapedius and tensor tympani muscles?
A. To amplify soft sounds
B. To dampen ossicular vibration and protect the inner ear from intense sound
C. To generate otoacoustic emissions
D. To open the Eustachian tube
Correct Answer: B
Rationale: These middle-ear muscles contract in response to loud sound, reducing transmission of energy.
Question 13. Where are the cell bodies of the auditory nerve (spiral ganglion) located?
A. In the brainstem
B. In the middle-ear cavity
C. In the modiolus of the cochlea
D. In the external canal
Correct Answer: C
Rationale: Spiral-ganglion neurons reside in the modiolus and send peripheral processes to the hair cells.
Question 14. What does “tonotopic organization” of the cochlea mean?
A. All frequencies are processed at the same place
B. Only low frequencies are coded
C. Frequency is coded only by firing rate
D. Different frequencies maximally stimulate different places along the basilar membrane
Correct Answer: D
Rationale: High frequencies peak near the base; low frequencies peak near the apex.
Question 15. What is the most common site of lesion for age-related hearing loss (presbycusis)?
A. Cochlear hair cells and associated structures
B. External auditory canal
C. Tympanic membrane only
D. Ossicular chain exclusively
Correct Answer: A
Rationale: Presbycusis is primarily a sensorineural loss involving cochlear degeneration.
Question 16. What structure is responsible for detecting rotational head movement?
A. The cochlea
B. The semicircular canals
C. The utricle only
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
DC HEALTH | BOARD OF AUDIOLOGY AND SPEECH-LANGUAGE PATHOLOGY
Hearing Aid Dispenser | Professional Licensure
DC — Hearing Aid Dispenser License Exam
District of Columbia Hearing Aid Dispenser License Examination
INSTITUTION DC Health | Board of Audiology and Speech-Language Pathology
PROGRAM Hearing Aid Dispenser Licensure
EXAM TITLE DC HEARING AID DISPENSER EXAM 2026/2027 | Verified Questions
COURSE TITLE District of Columbia Hearing Aid Dispenser License Examination
COURSE CODE DC-HAD
ACADEMIC YEAR 2026/2027
TOTAL QUESTIONS 150 Questions
Core Domains: Auditory Anatomy and Physiology • Hearing and Audiometric Assessment • Hearing Aid Technology and Selection • Fitting,
Verification, and Validation • Troubleshooting and Repair • Professional Standards and Ethics
Current Hearing Aid Dispenser Professional Focus
Multiple-Choice • Scenario Analysis • Applied Audiology Reasoning Format
2026/2027 Edition — Aligned with the DC Health Board of Audiology Hearing Aid Dispenser License Examination, DC Municipal Regulations, ANSI
Standards for hearing aid testing, and evidence-based audiology standards
CONTENTS
Domain Content Area Questions
Domain 1 Auditory Anatomy and Physiology 24
Domain 2 Hearing and Audiometric Assessment 30
Domain 3 Hearing Aid Technology and Selection 30
Domain 4 Fitting, Verification, and Validation 30
Domain 5 Troubleshooting and Repair 18
Domain 6 Professional Standards and Ethics 18
TOTAL All Domains 150
© BestSellerStuvia
Academic Year 2026/2027
DC-HAD | 2026/2027
ACTUAL QUESTIONS
Domain 1: Auditory Anatomy and Physiology
Question 1. Where is the organ of Corti located?
A. Within the cochlea, on the basilar membrane
B. In the middle ear cavity
C. In the external auditory canal
D. In the semicircular canals
Correct Answer: A
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
, © BestSellerStuvia |
Rationale: The organ of Corti, containing the sensory hair cells, rests on the basilar membrane inside the cochlea.
Question 2. What is the primary function of the outer hair cells?
A. To transmit signals directly to the auditory nerve only
B. To detect angular acceleration
C. To amplify and fine-tune cochlear mechanics, enhancing sensitivity and frequency selectivity
D. To equalize middle-ear pressure
Correct Answer: C
Rationale: Outer hair cells act as a cochlear amplifier, improving hearing sensitivity and frequency resolution.
Question 3. Which structure converts mechanical vibrations into electrical nerve impulses?
A. The hair cells of the organ of Corti
B. The tympanic membrane
C. The ossicles
D. The pinna
Correct Answer: A
Rationale: Hair-cell stereocilia deflection opens ion channels, generating receptor potentials that trigger neural firing.
Question 4. What type of hearing loss results from damage to the cochlea or auditory nerve?
A. Conductive hearing loss
B. Sensorineural hearing loss
C. Mixed hearing loss only when both are equal
D. Central auditory processing disorder exclusively
Correct Answer: B
Rationale: Sensorineural loss involves the inner ear or neural pathway and is the type most often managed with hearing aids.
Question 5. What is the function of the Eustachian tube?
A. To amplify sound
B. To house the organ of Corti
C. To equalize air pressure between the middle ear and the nasopharynx
D. To generate otoacoustic emissions
Correct Answer: C
Rationale: The Eustachian tube ventilates the middle ear and equalizes pressure across the tympanic membrane.
Question 6. Which frequency range is most critical for speech understanding?
A. 125–250 Hz only
B. 8,000–12,000 Hz only
C. Below 100 Hz
D. Approximately 500–4,000 Hz
Correct Answer: D
Rationale: The speech frequencies, especially the consonant region around 1–4 kHz, are essential for intelligibility.
Question 7. What does the tympanic membrane do?
A. Vibrates in response to sound waves and transmits energy to the ossicular chain
B. Generates neural impulses
C. Produces cerumen
D. Houses the stapedius muscle only
Correct Answer: A
Rationale: The eardrum converts acoustic energy into mechanical vibration of the middle-ear bones.
Question 8. Which ossicle is attached to the oval window?
A. Malleus
B. Stapes
C. Incus
D. None of the ossicles
Correct Answer: B
Rationale: The stapes footplate sits in the oval window, transmitting energy into the cochlear fluids.
Question 9. What is the primary role of the pinna (auricle)?
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
, © BestSellerStuvia |
A. To house the cochlea
B. To equalize pressure
C. To collect and funnel sound into the external auditory canal and provide localization cues
D. To produce endolymph
Correct Answer: C
Rationale: The pinna gathers sound and contributes to vertical localization and high-frequency amplification.
Question 10. Damage limited to the outer or middle ear typically produces which type of loss?
A. Sensorineural
B. Retrocochlear only
C. Central only
D. Conductive
Correct Answer: D
Rationale: Conductive loss results from impaired transmission of sound to the inner ear.
Question 11. What fluid fills the scala media?
A. Endolymph
B. Perilymph
C. Cerebrospinal fluid
D. Blood
Correct Answer: A
Rationale: Endolymph, high in potassium, bathes the organ of Corti within the cochlear duct.
Question 12. What is the function of the stapedius and tensor tympani muscles?
A. To amplify soft sounds
B. To dampen ossicular vibration and protect the inner ear from intense sound
C. To generate otoacoustic emissions
D. To open the Eustachian tube
Correct Answer: B
Rationale: These middle-ear muscles contract in response to loud sound, reducing transmission of energy.
Question 13. Where are the cell bodies of the auditory nerve (spiral ganglion) located?
A. In the brainstem
B. In the middle-ear cavity
C. In the modiolus of the cochlea
D. In the external canal
Correct Answer: C
Rationale: Spiral-ganglion neurons reside in the modiolus and send peripheral processes to the hair cells.
Question 14. What does “tonotopic organization” of the cochlea mean?
A. All frequencies are processed at the same place
B. Only low frequencies are coded
C. Frequency is coded only by firing rate
D. Different frequencies maximally stimulate different places along the basilar membrane
Correct Answer: D
Rationale: High frequencies peak near the base; low frequencies peak near the apex.
Question 15. What is the most common site of lesion for age-related hearing loss (presbycusis)?
A. Cochlear hair cells and associated structures
B. External auditory canal
C. Tympanic membrane only
D. Ossicular chain exclusively
Correct Answer: A
Rationale: Presbycusis is primarily a sensorineural loss involving cochlear degeneration.
Question 16. What structure is responsible for detecting rotational head movement?
A. The cochlea
B. The semicircular canals
C. The utricle only
© BestSellerStuvia | | DC-HAD | Academic Year 2026/2027
