Speech intelligibility saturates once the low-frequency target is attenuated 15 dB.
Evidence
The main effect of PTA reflected the fact that average audiometric threshold was negatively correlated with intelligibility in all listening situations. The interaction with SNR occurred because the correlations tended to be greater for low SNRs than high SNRs. This was particularly true for the sentence stimuli leading to the three-way interaction (Type * SNR * PTA). — Dijk, Pim van, Physiology, Psychoacoustics and…, 1229 (
#qualifies, via linked claim)
Categorization
Category: Factual Claims
Related
- Hearing thresholds correlate more strongly with speech intelligibility at low signal-to-noise ratios. (similarity 0.92)
- Audiometric pure-tone thresholds predict speech intelligibility even after sensitivity adjustment (similarity 0.92)
- Filtering high frequencies of speech does not hurt intelligibility beyond a modest cutoff (similarity 0.88)
- Speech intelligibility saturates beyond certain signal-to-noise ratio bounds. (similarity 0.88)
- SRT in filtered noise plateaus asymptotically beyond a threshold attenuation (similarity 0.87)
- Pure-tone average hearing sensitivity still predicts intelligibility even at equalized levels (similarity 0.87)
- Removing low-frequency energy from a target beyond 15 dB no longer impairs speech reception (similarity 0.86)
- Low-pass filtering a target worsens speech reception linearly until a floor. (similarity 0.85)
- The SII model’s assumed SNR range fails for sharply filtered speech signals (similarity 0.85)
- Speech reception thresholds plateau beyond a target low-pass attenuation floor (similarity 0.85)
- The SII model mispredicts intelligibility of sharply filtered speech and noise (similarity 0.84)
- A 1 dB SNR improvement raises speech intelligibility by 7 to 19 percent. (similarity 0.84)
- Hearing thresholds affect intelligibility uniformly while cognition acts situation-specifically (similarity 0.84)
- Improving speech intelligibility via noise reduction outweighs equivalent improvement of the target signal. (similarity 0.83)
- Linguistic context lets listeners understand speech at lower acoustic intelligibility (similarity 0.83)
Broader Connections
- Speech reception thresholds plateau beyond a target low-pass attenuation floor
#corroborates(0.90) - Sharply filtered speech violates standard speech-intelligibility-index SNR assumptions
#complicates(0.85) - Audiometric pure-tone thresholds predict speech intelligibility even after sensitivity adjustment
#qualifies(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1229