IHS Aid Technology 3

Question 1

What is the function of a telecoil (T-coil) in a hearing aid?

Accepted Answer

It picks up electromagnetic signals from compatible loop systems or telephones

Answer

A telecoil is an inductive pickup coil that converts electromagnetic energy from hearing loops or telephone handsets into audio signals, bypassing the microphone.

Question 2

Which of the following best describes 'frequency lowering' technology in hearing aids?

Accepted Answer

Transposing or compressing inaudible high-frequency sounds into a lower, audible range

Answer

Frequency lowering moves high-frequency speech cues (such as /s/ and /sh/) into a frequency region where the patient has better residual hearing.

Question 3

The ANSI/ASA S3.22 standard is used to measure and report:

Accepted Answer

Electroacoustic characteristics of hearing aids

Answer

ANSI/ASA S3.22 specifies the test methods and electroacoustic measurements—such as OSPL90, full-on gain, and THD—used to characterize hearing aid performance.

Question 4

What does 'WDRC' stand for in hearing aid signal processing?

Accepted Answer

Wide Dynamic Range Compression

Answer

Wide Dynamic Range Compression (WDRC) applies different amounts of gain across a range of input levels so that soft sounds are audible and loud sounds remain comfortable.

Question 5

A patient reports that their hearing aid sounds 'too tinny' and lacks bass. The most appropriate electroacoustic adjustment would be to:

Accepted Answer

Boost low-frequency gain and check for an overly large vent

Answer

A tinny sound typically indicates insufficient low-frequency amplification or excessive venting that allows low-frequency energy to escape; boosting lows and evaluating vent size addresses this.

IHS - International Hearing Society Practice Test

IHS - International Hearing Society Practice Test

IHS Aid Technology 3