Hearing-impaired patients with loudness recruitment could disentangle intensity and loudness encoding.

Evidence

Loudness is mainly the perceptual correlate of sound intensity, which is usually expressed in dB SPL as sound pressure level on a logarithmic scale. However, loudness judgments are also affected by several other variables, including physical sound parameters like e.g. duration, spectral content and temporal modulation as well many more acoustic and non-acoustic factors, including the particular task or context and personal factors like the individual hearing status (Florentine et al. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2610 (#corroborates, via linked claim)

Intensity, while it has concrete bearing on what sound will do to the hearing apparatus, is not the same metric as perceived loudness, which doubles with every ten-decibel increase, so that going from 40 to 50 decibels equals a rise of 100 percent. — George Michelsen Foy, Zero Decibels, 53 (#corroborates, via linked claim)

The largely linear relationship between categorical loudness and sound intensity over the range of presented levels, as well as the fact that our participants were from a rather homogenous group of normal hearing listeners with similar loudness perception, might have limited the ability to differentiate between the contributions of both measures to neural activation in the human auditory system. A promising next step would be the inclusion of hearing impaired participants characterized by an altered relationship between sound intensity and perceived loudness (e.g., loudness recruitment). Moreover, this approach could provide additional valuable information about the nature of hearing disorders associated with distorted loudness perceptions. This in the end might open a potential for the diagnostic use of auditory fMRI. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2645 (#expands, via linked claim)

Categorization

• XREF: connects to: Hearing-impaired listeners experience a steeper loudness-growth function known as recruitment; Recruitment can explain why loudness summation is absent in noise-induced hearing loss — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1960; Recruitment patients could disambiguate loudness from intensity encoding in fMRI (+7 more)

Related

• Recruitment patients could disambiguate loudness from intensity encoding in fMRI (similarity 0.95)
• Loudness recruitment in hearing loss could be probed via Heschl’s gyrus fMRI (similarity 0.92)
• Understanding loudness’s neural basis could improve recruitment treatment (similarity 0.92)
• Loudness recruitment in impaired listeners could reveal how cortex encodes perceived level (similarity 0.91)
• Hearing-impaired listeners experience a steeper loudness-growth function known as recruitment (similarity 0.91)
• Recruitment can explain why loudness summation is absent in noise-induced hearing loss (similarity 0.91)
• Testing hearing-impaired listeners could reveal how loudness distortion maps to brain activity (similarity 0.88)
• Loudness-growth slope increases with hearing-loss degree but resists exact prediction (similarity 0.87)
• Comparing normal and recruiting-impaired listeners would reveal where loudness is decoded (similarity 0.86)
• Posterior medial Heschl’s gyrus activation best predicts individual perceived loudness (similarity 0.86)
• The full loudness range squeezes into a smaller dynamic range for impaired listeners. (similarity 0.85)
• Loudness recruitment shrinks dynamic range while preserving overall loudness (similarity 0.85)
• In hearing-impaired regions loudness grows far faster with level (similarity 0.85)
• Whether loudness recruitment degrades speech perception remains unsettled (similarity 0.85)
• Auditory cortex activation linearly reflects perceived loudness rather than physical intensity (similarity 0.84)

Broader Connections

• Loudness depends on more than physical sound intensity alone #corroborates (0.92) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2610
• Perceived loudness and physical sound intensity follow different, non-intuitive mathematical scales #corroborates (0.90) — George Michelsen Foy, Zero Decibels, 53
• Loudness recruitment in hearing loss could be probed via Heschl’s gyrus fMRI #expands (0.88) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2645
• Whether loudness recruitment degrades speech perception remains unsettled #qualifies (0.85) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1693
• Loudness perception requires a tenfold intensity increase to double #corroborates (0.85)
• Loudness recruitment shrinks dynamic range while preserving overall loudness #corroborates (0.82)
• Near-threshold sounds may sound louder to impaired than to normal ears #corroborates (0.80) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 845