Listeners’ SNR JNDs may actually be intelligibility JNDs, not signal-level ones.

Evidence

That is, a change in level without a change in SNR was considered as good as—indeed if not better than—a change in SNR. While this finding does not coincide with their role in intelligibility, it is coincident with detectability of level and SNR changes (JNDs of 1.5 and 3.0 dB, respectively). — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669 (#corroborates, via linked claim)

This gave a mean SNR JND of 3.0 dB (σ = 1.0 dB), which, converted to intelligibility using the slope of the psychometric function, corresponded to a mean Intelligibility JND of 26 % (σ= 7.5 %). — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669 (#exemplifies, via linked claim)

Categorization

• XREF: connects to: Listeners value a level change as much or more than an equal-dB SNR change; Measured SNR JNDs may actually reflect intelligibility rather than SNR discrimination — Dijk, Pim van, Physiology, Psychoacoustics and…, 5683; Listeners may judge SNR changes via perceived intelligibility rather than raw signal level — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669 (+1 more)

Related

• Listeners may judge SNR changes via perceived intelligibility rather than raw signal level (similarity 0.97)
• Listeners value a level change as much or more than an equal-dB SNR change (similarity 0.94)
• Measured SNR JNDs may actually reflect intelligibility rather than SNR discrimination (similarity 0.93)
• A 3 dB SNR just-noticeable difference corresponds to a 26% intelligibility change in listeners. (similarity 0.92)
• Listeners value loudness increases as much as SNR improvements they provide (similarity 0.90)
• Pure level changes are rated as valuable as SNR changes despite not aiding intelligibility (similarity 0.89)
• SNR just-noticeable difference grows from about 3 to 3.7 dB at positive reference SNRs (similarity 0.88)
• The just noticeable difference in signal-to-noise ratio for speech is about 3 dB (similarity 0.88)
• Speech-intelligibility JNDs cannot be cleanly separated from SNR JNDs (similarity 0.87)
• Detectable changes in speech SNR correspond to roughly 26 percent changes in word intelligibility (similarity 0.87)
• Listeners may be judging speech intelligibility rather than raw signal-to-noise ratio (similarity 0.87)
• Detection threshold for SNR change in sentences averages about 3 dB (similarity 0.86)
• Listeners benefit from but do not fully use broadband spectral information. (similarity 0.86)
• Listener ratings of speech benefit only become significant once SNR change reaches 4 dB (similarity 0.86)
• A 1 dB SNR improvement raises speech intelligibility by 7 to 19 percent. (similarity 0.85)

Broader Connections

• Listeners may judge SNR changes via perceived intelligibility rather than raw signal level #corroborates (0.95) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669
• A 3 dB SNR just-noticeable difference corresponds to a 26% intelligibility change in listeners. #exemplifies (0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669