Troubleshooting Hearing Instruments Flashcards

A patient reports their BTE hearing aid produces a loud, continuous squeal only when their hand is placed near the ear. What is the most likely cause?

Answer: Acoustic feedback due to a loose earmold fit

A loose or improperly fitted earmold allows amplified sound to escape and re-enter the microphone, causing feedback squealing.

A patient's ITE hearing aid produces intermittent sound that cuts in and out. After ruling out battery and wax blockage, what is the next most likely cause?

Answer: Defective volume control or loose internal connection

Intermittent sound after ruling out battery and wax typically indicates a faulty potentiometer, cracked solder joint, or loose internal connection.

Which tool is used to verify that a hearing aid's output matches its prescribed target in a clinical troubleshooting session?

Answer: Real-ear measurement (REM) system

Real-ear measurement systems use a probe microphone to verify hearing aid output in the ear canal against prescriptive targets.

A receiver-in-canal (RIC) hearing aid suddenly sounds very weak. The battery is new and the dome is clear of wax. What should be checked next?

Answer: Inspect and replace the wax guard on the receiver

A clogged wax guard on the RIC receiver is a very common cause of sudden reduced output even when the battery is fresh and the dome appears clear.

A patient complains that their hearing aid sounds 'tinny' or too sharp after a programming adjustment. Which parameter was most likely increased excessively?

Answer: High-frequency gain

Excessive high-frequency gain produces a tinny or harsh sound quality, as the treble components are over-amplified relative to the bass.

During troubleshooting, you notice corrosion on the battery contacts of a hearing aid. What is the recommended corrective action?

Answer: Clean contacts with a dry cotton swab or special contact cleaner, then test

Corroded battery contacts should be cleaned with a dry swab or approved contact cleaner to restore proper electrical connection before replacing the device.

A patient's hearing aid works normally on a listening stethoscope but the patient still reports no sound in their ear. What is the most likely problem?

Answer: The earmold or dome tubing is blocked or disconnected

If the aid functions on a stethoscope, the aid itself is working, so the issue lies in the acoustic pathway to the ear—typically a blocked or disconnected earmold/tubing.