CSD 320 Final Exam Questions with Correct Answers Latest Update 2025/2026
true or false: Analog hearing aids sample sound waves and store sound information as binary
digits (bits) - Answers false
A hearing aid takes an average speech level of 60 dB and amplifies it so that the user hears the
speech at 85 dB. What is the gain of this hearing aid in dB? - Answers 25
List 2 advantages and 2 disadvantages of an ITE (in-the-ear) hearing aid - Answers Advantages:
1) less visible, 2) more room for features
Disadvantages: 1) weaker/less powerful, 2) shorter battery life
true or false: Any hearing loss can be fit with any hearing aid size or style - Answers false
true or false: Hearing aids restore normal hearing - Answers false
Which style of hearing aid are children generally fit with it? - Answers BTE
People with hearing loss have reduced dynamic ranges of hearing. Therefore, hearing aids
change the amount of gain they apply based on the sound pressure level of the input sound to
the hearing aid. What is this called? - Answers Wide Dynamic Range Compression
true or false: Cochlear implants work by bypassing the air conduction pathway of the ear and
directly stimulating the auditory nerve with electricity. - Answers true
People with single-sided deafness are candidates for cochlear implants - Answers true
A disorder present at birth is called _______, whereas a condition that someone develops later in
life is called _________ . - Answers 1. congenital
2. acquired
Partially formed outer ear with small ear canal is: - Answers stenosis
Absent/closed ear canal with small outer earlobe is: - Answers atresia
Absence of ear canal and pinna - Answers anotia
A patent (open) PE tube is associated with what type of tympanogram? - Answers Type B with
large ECV
true or false: most etiologies of prenatal hearing loss are known - Answers false
What is the most common cause of deafblindness? - Answers Usher's syndrome
true or false: Ototoxicity refers to hearing loss cause by drugs such as antibiotics or
, chemotherapy agents. - Answers true
true or false: most congenital hearing losses are genetic - Answers true
birth to 3 months old - Answers startle/cry over loud noises, awakens to loud noises, smiles
when spoken to, listens to someone talking, begins to coo
4-6 months old - Answers looks for sound sources, notices toys that make noises, babbling
begins
7 months to 1 year old - Answers recognizes common words, turns when name is called, listens
when spoken to, imitates some sounds
1-2 years old - Answers follows simple commands, listens on the telephone, begins to use 1-2
word sentences
2-3 years old - Answers may ask simple questions, says names of familiar people, can follow 2
step commands, uses 2-3 word sentences
3-4 years old - Answers talks using 2-3 sentences at a time, can be understood by family,
understands terms like 'in' 'on' and 'under'
what is the prevalence of HL in children? - Answers - 3 in every 1,000 babies born
- 17 in every 1,000 children under 18 have HL
what percentage of children experience at least 1 episode of otitis media by their 3rd birthday? -
Answers 75%
non-specific risk factors for HL: - Answers - family history of childhood HL
- longer stay in the NICU
- ototoxic medications/aminoglycosides
- mechanical ventilation (not ventilation itself, but the reason you're on ventilation)
- supplemental oxygen
- low Apgar
- low birthweight
congenital risk factors for HL: - Answers - neurodegenerative disorders (often mitochondrial)
- syndromic
- congenital infection
true or false: Analog hearing aids sample sound waves and store sound information as binary
digits (bits) - Answers false
A hearing aid takes an average speech level of 60 dB and amplifies it so that the user hears the
speech at 85 dB. What is the gain of this hearing aid in dB? - Answers 25
List 2 advantages and 2 disadvantages of an ITE (in-the-ear) hearing aid - Answers Advantages:
1) less visible, 2) more room for features
Disadvantages: 1) weaker/less powerful, 2) shorter battery life
true or false: Any hearing loss can be fit with any hearing aid size or style - Answers false
true or false: Hearing aids restore normal hearing - Answers false
Which style of hearing aid are children generally fit with it? - Answers BTE
People with hearing loss have reduced dynamic ranges of hearing. Therefore, hearing aids
change the amount of gain they apply based on the sound pressure level of the input sound to
the hearing aid. What is this called? - Answers Wide Dynamic Range Compression
true or false: Cochlear implants work by bypassing the air conduction pathway of the ear and
directly stimulating the auditory nerve with electricity. - Answers true
People with single-sided deafness are candidates for cochlear implants - Answers true
A disorder present at birth is called _______, whereas a condition that someone develops later in
life is called _________ . - Answers 1. congenital
2. acquired
Partially formed outer ear with small ear canal is: - Answers stenosis
Absent/closed ear canal with small outer earlobe is: - Answers atresia
Absence of ear canal and pinna - Answers anotia
A patent (open) PE tube is associated with what type of tympanogram? - Answers Type B with
large ECV
true or false: most etiologies of prenatal hearing loss are known - Answers false
What is the most common cause of deafblindness? - Answers Usher's syndrome
true or false: Ototoxicity refers to hearing loss cause by drugs such as antibiotics or
, chemotherapy agents. - Answers true
true or false: most congenital hearing losses are genetic - Answers true
birth to 3 months old - Answers startle/cry over loud noises, awakens to loud noises, smiles
when spoken to, listens to someone talking, begins to coo
4-6 months old - Answers looks for sound sources, notices toys that make noises, babbling
begins
7 months to 1 year old - Answers recognizes common words, turns when name is called, listens
when spoken to, imitates some sounds
1-2 years old - Answers follows simple commands, listens on the telephone, begins to use 1-2
word sentences
2-3 years old - Answers may ask simple questions, says names of familiar people, can follow 2
step commands, uses 2-3 word sentences
3-4 years old - Answers talks using 2-3 sentences at a time, can be understood by family,
understands terms like 'in' 'on' and 'under'
what is the prevalence of HL in children? - Answers - 3 in every 1,000 babies born
- 17 in every 1,000 children under 18 have HL
what percentage of children experience at least 1 episode of otitis media by their 3rd birthday? -
Answers 75%
non-specific risk factors for HL: - Answers - family history of childhood HL
- longer stay in the NICU
- ototoxic medications/aminoglycosides
- mechanical ventilation (not ventilation itself, but the reason you're on ventilation)
- supplemental oxygen
- low Apgar
- low birthweight
congenital risk factors for HL: - Answers - neurodegenerative disorders (often mitochondrial)
- syndromic
- congenital infection
