Hearing aids must preserve adequate signal-to-noise ratio across varied scenarios

Evidence

SRTs were not symmetrical as the SNR was varied up or down with the same amount. The benefit was greater when the filtered part of the noise decreased rather than when the filtered part of the target increased. This result questions the uniformly distributed importance over the [‑15; + 15] interval adopted by the SII and suggests that a greater importance should be attributed to positive SNRs compared to negative SNRs. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3536 (#expands, via linked claim)

Categorization

• XREF: connects to: Directive microphone arrays in hearing aids improve speech intelligibility in noise; Hearing aids address only audibility, loudness, and noise, not spectral and temporal processing; Hearing-impaired listeners need higher signal-to-noise ratios than normal hearers do (+5 more)

Broader Connections

• Noise gates and compression let aids make faint speech audible without amplifying noise #expands (0.85)
• Hearing-impaired listeners need higher signal-to-noise ratios than normal hearers do #expands (0.80)
• Improving speech intelligibility via noise reduction outweighs equivalent improvement of the target signal. #expands (0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3536
• Hearing aids address audibility, recruitment, and noise but not resolution deficits #qualifies (0.75)
• Audibility is the greatest factor in hearing-loss communication difficulty #corroborates (0.72)