Contralateral efferent inhibition of compression amplifies inter-aural level differences
Evidence
Given that the stimulus was binaural and filtered through appropriate HRTFs, there was an acoustic inter-aural level difference (ILD), hence the greater amplitude for the left (blue traces) than for the right ear (red traces). Strikingly, however, the inter-aural output difference (IOD, black arrows in Fig. 2a ) was greater for the MOC than for the STD strategy. This is because the gain (or compression) in the each of the two MOC processors was inhibited in direct proportion to the output energy from the corresponding frequency channel in the contralateral processor. Because the stimulus level was higher on the left ear, the output amplitude was also higher for the leftthan for the right-ear MOC processor. Hence, the left-ear MOC processor inhibited the right-ear MOC processor more than the other way around. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1961
Categorization
Category: Causal Relationships
Related
- Contralateral efferent inhibition amplifies interaural level differences (similarity 0.94)
- Contralateral efferent inhibition is nonlinear and output-dependent, amplifying asymmetries (similarity 0.91)
- Contralateral efferent inhibition is proportional to output energy, magnifying inter-aural differences. (similarity 0.91)
- Output-based cross-ear inhibition amplifies existing inter-aural asymmetries (similarity 0.89)
- Contralateral dominance weakens at cortical stages due to commissural connections (similarity 0.89)
- Stronger contralateral sound causes greater efferent inhibition and more linear cochlear response (similarity 0.88)
- The contralateral efferent reflex inhibits cochlear compression at matched frequencies (similarity 0.87)
- The stronger side suppresses the weaker side more, sharpening the lateral asymmetry. (similarity 0.86)
- The medial olivocochlear reflex inhibits cochlear compression contralaterally in a graded, output-dependent manner (similarity 0.84)
- The contralateral efferent reflex strengthens gradually over tens of milliseconds (similarity 0.84)
- Contralateral ear dominance weakens higher in the auditory pathway (similarity 0.83)
- Output-dependent inhibition creates amplificatory feedback that sharpens binaural asymmetries (similarity 0.83)
- Contralateral stimuli explain auditory brain activity better than ipsilateral ones (similarity 0.82)
- Interaural level differences of 1-2 dB produce just-audible lateral displacement (similarity 0.82)
- Dynamic CI compression can selectively reinstate or remove contralateral efferent effects (similarity 0.82)
Broader Connections
- Contralateral efferent-mediated processing can spatially segregate concurrent speech sources by ear
#expands(0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1978 - Loss of peripheral compression alone impairs recognition of low-level syllables between louder ones
#contradicts(0.72) — Dijk, Pim van, Physiology, Psychoacoustics and…, 4045