Individual Listener Preference for Strength of Single-Microphone Noise-Reduction; Trade-off Between Noise Tolerance and Signal Distortion Tolerance.
Ilja Reinten, Inge de Ronde-Brons, Rolph Houben and 1 others
PMID 37525630WHAT IT FOUND
Listeners prefer hearing aid noise reduction only if they tolerate the resulting sound distortion.
Some people dislike the distorted speech more than the background noise. You cannot set noise reduction strength based on noise tolerance alone; you must check how the patient reacts to the processed sound quality.
Key findings
01Individual preference for noise reduction strength depends on a trade-off between tolerating background noise and tolerating signal distortion.
02Listeners who were more tolerant of signal distortion preferred stronger noise reduction, while those sensitive to distortion preferred weaker settings.
03The negative impact of signal distortion on preference was similar in magnitude to the negative impact of background noise.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study used an artificial noise-reduction algorithm, so the specific type of distortion may not perfectly match all commercial hearing aids. Only stationary noise was used, which is simpler than the speech babble patients encounter in real life. The sample size was small (12 participants), and the paired comparison method is too lengthy for routine clinical use. The study did not identify personal factors (like age or hearing loss severity) that predict distortion tolerance.
Declared interests
The authors declared no potential conflicts of interest and received no financial support for the research.
The easy way to misread this
Do not assume that higher noise reduction strength always leads to better satisfaction. For patients who are sensitive to signal distortion, aggressive noise reduction can degrade speech quality enough to make them prefer the unprocessed, noisier signal.