Hearing aids address three deficits but leave frequency, temporal, and pitch processing unaddressed.

Evidence

Modern hearing aids primarily address three areas of perceptual deficits experienced by listeners with hearing loss: reduced audibility through amplification, loudness recruitment through compression, and increased susceptibility to noise through directional microphones and noise reduction. This leaves a number of perceptual deficits that are not well addressed by hearing aids: poor frequency resolution, poor temporal processing, and poor pitch perception. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1714

Categorization

• SEED: Could seed an explainer on the gap between what hearing aids actually fix and the deficits patients still report — namely speech-in-noise difficulty despite amplification.
• corroborated: 2 independent passages support this claim — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1714