Exam Preview for 33737: Feedback Management in Hearing Aid Technolo

Feedback Management in Hearing Aid Technology

Please note: exam questions are subject to change.

1. Which is NOT a form of hearing aid feedback? Acoustic Mechanical Suppression Electronic
2. When does acoustic feedback occur? When amplified sound is reintroduced to the hearing aid microphone When amplified sound is reduced due to improper hearing aid venting When acoustic cues are distorted by aggressive noise control When acoustic cues are amplified above the fitting target
3. What is NOT a possible consequence of feedback? Loudness discomfort Reduced sound quality Reduced speech understanding Improved hearing aid satisfaction
4. What is one example of distortion that can occur as a result of feedback cancellation being too aggressive? Splashing Chirping Sizzling Croaking
5. What type of filter is used in an adaptive feedback cancellation strategy? High pass Adaptive Low pass Fixed
6. What is Maximum Stable Gain? The maximum gain that can be applied with aggressive compression The maximum gain required for 100% word recognition The maximum gain available with frequency lowering The maximum gain that can be applied in a hearing aid without feedback
7. Which tests can be used to evaluate the impact of feedback on hearing aid performance? AGBF and Max-REIG HINT and QuickSIN SRT and ABR REUR and REUG
8. What is one potential effect of reducing high frequency gain? Improved audibility of children's voices Reduced audibility of vowel sounds Reduced word recognition ability Improved audibility of consonant sounds
9. What is the idea behind feedback cancellation algorithms? Shift high frequency gain to lower frequencies to eliminate whistling Shift the phase of the feedback signal relative to the input signal Increase low frequency gain to offset high frequency gain Decrease low frequency gain to eliminate buzzing
10. What is entrainment? Additional hearing aid gain Decreased hearing aid output Artifact that occurs when noise suppression engages Artifact that occurs when the feedback canceller mistakenly attempts to cancel a tonal input to the hearing aid