IHS Instrument Selection 4 — Questions and Answers
Question 1: When fitting hearing instruments for a professional musician, which consideration is MOST critical during instrument selection?
- Selecting the smallest instrument for stage appearance
- Ensuring the instrument handles high SPL input without distortion and includes a music program (Correct answer)
- Prioritizing maximum output power for loud venues
- Choosing instruments with the longest battery life
Correct answer: Ensuring the instrument handles high SPL input without distortion and includes a music program
Musicians require instruments that process high sound pressure levels without distortion and benefit from dedicated music programs with different compression settings than speech programs.
Question 2: An elderly patient who lives alone reports difficulty hearing smoke alarms. Which recommendation is MOST appropriate?
- Significantly increase hearing aid gain
- Recommend alerting assistive devices such as vibrotactile or visual alarms in addition to hearing aids (Correct answer)
- Fit a more powerful hearing aid style
- Add a telecoil to the existing hearing aid
Correct answer: Recommend alerting assistive devices such as vibrotactile or visual alarms in addition to hearing aids
Alerting devices such as bed shakers or strobe alarms supplement hearing aids to ensure safety for critical environmental signals, especially during sleep.
Question 3: Which factor is MOST important when selecting a hearing instrument for a 3-year-old child?
- Cosmetic appearance and discreteness
- Safety features including tamper-resistant battery doors and pediatric earmolds (Correct answer)
- Bluetooth connectivity for tablets
- Manual volume control access
Correct answer: Safety features including tamper-resistant battery doors and pediatric earmolds
Pediatric instruments must include tamper-resistant battery doors to prevent battery ingestion and allow appropriate gain for consistent auditory access during language development.
Question 4: A patient works outdoors in varying weather. Which instrument characteristic should be PRIORITIZED during selection?
- High IP (Ingress Protection) rating for moisture and dust resistance (Correct answer)
- Smallest available battery size
- Multiple manual program buttons
- Extended Bluetooth range
Correct answer: High IP (Ingress Protection) rating for moisture and dust resistance
A higher IP rating (e.g., IP67 or IP68) ensures the instrument resists damage from water ingress and dust exposure common in outdoor work environments.
Question 5: A patient has unilateral profound sensorineural hearing loss with normal hearing in the opposite ear. Which fitting approach is MOST appropriate?
- A standard power BTE on the impaired side
- A CROS or BiCROS system (Correct answer)
- A high-power ITE on the impaired side
- Binaural RIC instruments
Correct answer: A CROS or BiCROS system
CROS systems route sound from the non-aidable ear to the normal or better-hearing ear, allowing the patient to hear sounds originating from their deaf side.
Question 6: When counseling a first-time hearing aid user, which realistic expectation is MOST important to establish?
- Hearing aids will restore hearing to normal
- An adaptation period of several weeks is normal and hearing will not sound exactly like pre-loss hearing (Correct answer)
- Maximum benefit is achieved immediately at the fitting appointment
- Hearing aids are effective primarily for telephone use
Correct answer: An adaptation period of several weeks is normal and hearing will not sound exactly like pre-loss hearing
Realistic expectations about the adaptation period and the nature of amplified sound reduce disappointment and improve long-term patient adherence.
Question 7: A patient reports their hearing aid whistles whenever someone gives them a close hug. This is MOST likely due to:
- Insufficient battery voltage
- Acoustic feedback caused by amplified sound re-entering the microphone during close contact (Correct answer)
- A defective telecoil component
- Excessive noise reduction algorithm activation
Correct answer: Acoustic feedback caused by amplified sound re-entering the microphone during close contact
Close contact places objects near the microphone while the receiver outputs amplified sound, creating a feedback loop when that sound leaks back to the microphone.
IHS Instrument Selection 4
When fitting hearing instruments for a professional musician, which consideration is MOST critical during instrument selection?