A 3 dB SNR just-noticeable difference corresponds to a 26% intelligibility change in listeners.
Evidence
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
Categorization
- corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 5669
- XREF: connects to: The just noticeable difference in signal-to-noise ratio for speech is about 3 dB — Dijk, Pim van, Physiology, Psychoacoustics and…, 5674; SNR must rise at least 3 dB before listeners tolerate one more conversation — Dijk, Pim van, Physiology, Psychoacoustics and…, 5697; SNR just-noticeable difference grows from about 3 to 3.7 dB at positive reference SNRs — Dijk, Pim van, Physiology, Psychoacoustics and…, 5676 (+8 more)
Broader Connections
- A 1 dB SNR improvement boosts intelligibility by 7 to 19 percent
#contradicts(0.85) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1734 - Every 1 dB of signal-to-noise improvement raises speech intelligibility by 7 to 19 percent
#contradicts(0.85) - Pure level changes are rated as valuable as SNR changes despite not aiding intelligibility
#qualifies(0.85) - Listener ratings of speech benefit only become significant once SNR change reaches 4 dB
#qualifies(0.80) - Binaural listening yields a 5-7 dB intelligibility advantage over monaural
#complicates(0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1514 - Measured SNR JNDs may actually reflect intelligibility rather than SNR discrimination
#corroborates(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5683 - The just-noticeable difference quantifies the smallest audible change in a sound
#expands(0.70)