IHS Instrument Fitting 5

Question 1

During a hearing aid fitting verification, the functional gain measurement is performed by comparing:

Accepted Answer

Aided and unaided soundfield thresholds

Answer

Functional gain is the difference in dB between unaided and aided soundfield pure-tone thresholds, measuring how much audibility the hearing aid adds.

Question 2

A patient with a steeply sloping high-frequency hearing loss is fitted with open-fit RIC devices. A common complaint is difficulty understanding speech in noise. The MOST appropriate adjustment is:

Accepted Answer

Switch to a closed dome or custom earmold

Answer

Switching to a closed dome or custom earmold improves low-to-mid frequency retention in the canal, reducing the low-frequency noise that leaks in through the open vent and competing with speech.

Question 3

Which outcome measure is specifically designed to assess hearing aid benefit in four listening situations important to the patient?

Accepted Answer

APHAB (Abbreviated Profile of Hearing Aid Benefit)

Answer

The APHAB measures benefit across four subscales: Ease of Communication, Background Noise, Reverberation, and Aversiveness of Sound.

Question 4

For a patient whose audiogram shows a 'cookie bite' configuration (greatest loss in the mid frequencies), the fitting challenge is primarily:

Accepted Answer

Providing mid-frequency gain without over-amplifying highs and lows

Answer

Cookie bite losses require selective mid-frequency amplification while keeping low and high-frequency gain appropriate to avoid distortion or discomfort.

Question 5

When documenting a hearing aid fitting for a minor patient, which additional step is legally and ethically required compared to adult fittings?

Accepted Answer

Parental or guardian informed consent must be obtained

Answer

Fitting hearing devices on minors requires informed consent from a parent or legal guardian, as the child cannot legally consent on their own behalf.

IHS - International Hearing Society Practice Test

IHS - International Hearing Society Practice Test

IHS Instrument Fitting 5