Understanding loudness’s neural basis could improve recruitment treatment

Evidence

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: Presbyacusis shows frequency-dependent recruitment strongest at high frequencies; Recruitment patients could disambiguate loudness from intensity encoding in fMRI; Loudness recruitment in hearing loss could be probed via Heschl’s gyrus fMRI — Dijk, Pim van, Physiology, Psychoacoustics and…, 2645 (+1 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 0.94)
• Loudness recruitment in impaired listeners could reveal how cortex encodes perceived level (similarity 0.92)
• Hearing-impaired patients with loudness recruitment could disentangle intensity and loudness encoding. (similarity 0.92)
• Recruitment can explain why loudness summation is absent in noise-induced hearing loss (similarity 0.89)
• Posterior medial Heschl’s gyrus activation best predicts individual perceived loudness (similarity 0.88)
• Testing hearing-impaired listeners could reveal how loudness distortion maps to brain activity (similarity 0.87)
• Comparing normal and recruiting-impaired listeners would reveal where loudness is decoded (similarity 0.86)
• Loudness recruitment shrinks dynamic range while preserving overall loudness (similarity 0.86)
• Hearing-impaired listeners experience a steeper loudness-growth function known as recruitment (similarity 0.86)
• Whether loudness recruitment degrades speech perception remains unsettled (similarity 0.86)
• The neural site where intensity becomes loudness remains unknown. (similarity 0.85)
• Sensorineural hearing loss causes abnormal rapid loudness growth called recruitment (similarity 0.85)
• fMRI can map how sound intensity and loudness interact across the auditory pathway (similarity 0.85)
• Mild-moderate losses show recruitment while severe-profound losses show underrecruitment (similarity 0.84)

Broader Connections

• Loudness recruitment in hearing loss could be probed via Heschl’s gyrus fMRI #expands (0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2645
• Loudness perception involves central mechanisms beyond cochlear vibration #corroborates (0.75)