IHS Instrument Fitting 2

Question 1

Which real-ear measurement (REM) target is most commonly used when fitting hearing aids to adults using evidence-based best practices?

Accepted Answer

NAL-NL2

Answer

NAL-NL2 (National Acoustic Laboratories Non-Linear version 2) is a widely adopted prescriptive target for fitting hearing aids in adults.

Question 2

When performing a real-ear aided response (REAR) measurement, the probe microphone is placed:

Accepted Answer

Approximately 5–6 mm from the eardrum

Answer

The probe tube is inserted to approximately 5–6 mm from the tympanic membrane to accurately capture the sound at the eardrum.

Question 3

A patient reports that soft speech sounds are inaudible even at maximum volume. The MOST likely fitting issue is:

Accepted Answer

Insufficient gain for soft inputs

Answer

Insufficient gain for soft-level inputs means quiet sounds are not amplified enough to reach audibility.

Question 4

The DSL m[i/o] prescriptive method was specifically developed for:

Accepted Answer

Pediatric populations and infants

Answer

DSL m[i/o] (Desired Sensation Level) was designed to optimize audibility of speech for children, including infants.

Question 5

Which term describes the maximum output of a hearing aid regardless of input level?

Accepted Answer

OSPL90

Answer

OSPL90 (Output Sound Pressure Level at 90 dB input) is the standardized measure of a hearing aid's maximum output.

IHS - International Hearing Society Practice Test