IHS Aid Technology 4

Question 1

In a CROS (Contralateral Routing of Signal) system, where is the microphone placed and where is the signal delivered?

Accepted Answer

Microphone on the poorer ear, signal delivered to the better ear

Answer

In a CROS system, a transmitter/microphone is worn on the non-functional ear and the audio signal is wirelessly routed to a receiver worn on the better ear.

Question 2

What is the primary advantage of a bone-anchored hearing aid (BAHA) over a conventional air-conduction aid for conductive hearing loss?

Accepted Answer

It bypasses the damaged outer or middle ear by transmitting vibrations directly to the cochlea through bone

Answer

A BAHA uses direct bone conduction via an osseointegrated implant to deliver sound to the cochlea, bypassing a congenitally absent, malformed, or surgically altered outer/middle ear.

Question 3

Which hearing aid style places ALL components—including the microphone, processor, and receiver—inside the ear canal?

Accepted Answer

Completely-in-canal (CIC)

Answer

Completely-in-canal (CIC) aids have all components housed in a small shell that fits entirely within the ear canal, making them the least visible traditional style.

Question 4

What is 'datalogging' in modern hearing aids?

Accepted Answer

Storing information about the environments and listening situations the user encounters

Answer

Datalogging records details such as hours of use, listening environments, volume control adjustments, and program usage, which clinicians use to guide counseling and fine-tuning.

Question 5

A hearing aid's 'attack time' in compression processing refers to:

Accepted Answer

How quickly the gain decreases when input level rises above the compression threshold

Answer

Attack time is the speed at which the compression circuit reduces gain in response to a sudden increase in input level above the compression threshold.

IHS - International Hearing Society Practice Test

IHS - International Hearing Society Practice Test

IHS Aid Technology 4