Fine Tuning Flashcards
List the steps during conformity check
- Ask pt how they’re doing with HAs
- Rank problems in order of importance
- Programming adjustments
What is the goal of DNR?
Reduce background noise
What is Gain-DNR
Reduces overall gain when speech is not dominant
What is traditional DNR?
It removes noise from combined speech and noise signal.
Used when speech is dominant
What is Spatial DNR?
Predicts direction of speech and remove noise around it by acting like a directional mircophone
What are the 3 types of DNR?
- Gain DNR
- Traditional DNR
- Spatial DNR
What is transient noise reduction (TNR) important for?
Comfort
How does wind noise reduction (WNR) affect speech? How is it caused?
By masking it and caused by turbulence over microphone
When are omnidirectional microphones preferred? & when does it provide the best benefit?
In quiet
When there’s bilateral directionality when the speech signal is always in front of the listener
How much improved of SNR does omni microphone provide?
6 dB
What are the 4 most common desirable hearing aid attributes?
- Improved ability to hear in quiet
- ” “ to hear in noisy settings
- Physical Comfort
- Reliability
What fine tuning fixes should one consider for own voice if OE is present?
- Increase venting/more open fit
- Increase length of bony portion of canal
- Add LF gain (last resort)
How to apply fine tuning fixes for own voice if OE is not present
- Decrease LF gain
- Decrease overall gain
- Verify that acoustic option is correct in software
Why can hearing one’s voice cause distortion? How do you fix it?
- Own voice is loud at the level of HA due to proximity to mouth, ear, and microphone
- EAA
When should distortion of one’s voice not occur? Why & how do you fix it?
WDRC
- Getting less gain for loud sounds
- Check CR & increase MPO
