HAC Hearing Aid Fitting & Adjustment 2

Question 1

Which real-ear measurement verifies that the hearing aid output matches the prescribed target at the eardrum?

Accepted Answer

Real-ear insertion gain (REIG)

Answer

REIG is the difference between REAR and REUR, directly showing how much gain the hearing aid adds at the eardrum compared to the prescribed target.

Question 2

A patient reports their hearing aid whistles when they cup their hand near their ear. What is the most likely cause?

Accepted Answer

Feedback due to acoustic leakage

Answer

Feedback occurs when amplified sound leaks out of the ear canal and re-enters the microphone, creating an oscillation loop.

Question 3

When fitting a child with a hearing aid, why is the RECD (real-ear-to-coupler difference) especially important?

Accepted Answer

Children's ear canals produce more gain than a 2-cc coupler predicts

Answer

Smaller ear canals create higher SPL than a standard 2-cc coupler, so RECD corrects coupler-based targets to accurately represent real-ear levels in children.

Question 4

Which fitting formula is specifically designed for children and incorporates loudness normalization?

Accepted Answer

DSL v5.0

Answer

Desired Sensation Level (DSL) v5.0 was developed to normalize loudness for children across the speech spectrum and includes pediatric-specific targets.

Question 5

A patient with a precipitous high-frequency hearing loss complains that amplified speech sounds 'tinny.' What adjustment should you consider first?

Accepted Answer

Reduce high-frequency gain

Answer

Reducing high-frequency gain lowers the perceived brightness/tinny quality that results from over-amplification of high frequencies relative to lows.

(HAC) Hearing Aid Certification Practice Test

(HAC) Hearing Aid Certification Practice Test

HAC Hearing Aid Fitting & Adjustment 2