Interaural level sensitivity reflects peripheral level-coding efficiency, not central processing.
Evidence
The thresholds for the ILD and LEVEL tasks correlated for both the lowand high-frequency stimuli. This confirms the results of our earlier study (Ochi et al. 2014 ), suggesting that the efficiency of level coding in the auditory periphery is a major factor accounting for inter-individual variation of ILD sensitivity. The ITD task showed a correlation with the TIME task for the high-frequency stimulus; when the factors of age and hearing-impairments were controlled. This again is consistent with the finding of our earlier study (Ochi et al. 2014 ), suggesting that a listener’s ITD sensitivity is well accounted for by the listener’s sensitivity to temporal (envelope) structure. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1080
Categorization
Category: Causal Relationships
Related
- Cortical intensity encoding becomes ear-independent through strong interhemispheric connections (similarity 0.94)
- Peripheral level coding largely explains individual differences in ILD sensitivity. (similarity 0.92)
- Individual ILD sensitivity is largely set by peripheral level-coding efficiency. (similarity 0.91)
- Inter-listener ILD differences arise from pre-binaural level-coding efficiency (similarity 0.91)
- Peripheral monaural coding efficiency partly predicts binaural lateralization ability (similarity 0.89)
- Inter-Listener variability in sound localization partly reflects peripheral coding efficiency that precedes binaural computation. (similarity 0.89)
- Monaural encoding efficiency partly explains inter-listener differences in binaural sensitivity (similarity 0.88)
- Peripheral coding efficiency drives lateralization except for low-frequency ITD (similarity 0.84)
- Low sensation level impairs ITD and ILD discrimination even in normal listeners (similarity 0.84)
- Binaural localization accuracy depends on monaural coding efficiency before interaural comparison (similarity 0.84)
- Interaural level differences grow with frequency and side placement (similarity 0.83)
- Interaural level differences grow with frequency and reach up to 20 dB. (similarity 0.83)
- ITD sensitivity is not explained by basic temporal-structure processing efficiency. (similarity 0.82)
- Primary auditory cortex shows the strongest intensity encoding along the auditory pathway (similarity 0.82)
- Interaural level differences and time shifts trade off to control lateralization (similarity 0.82)
Broader Connections
- Sound localization deficits in hearing loss come from neural coding changes, not audibility.
#complicates(0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1600 - Contralateral efferent inhibition amplifies interaural level differences
#contradicts(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1939