MOCR activation during long stimuli can reduce measured suppression
Evidence
The FDMC method avoids the confounds of previous forward-masking methods used to measure the efferent effect by using a combined duration of the masker-plus-signal stimulus of 25 ms, which is within the efferent onset delay. Hence, the representation of the signal should be unaffected by efferent activity elicited by the masker. The effect of efferent activation on cochlear gain can then be separately studied by presenting a precursor sound (to activate the efferent system) prior to the onset of the combined FDMC masker-signal stimulus. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5953 (
#qualifies, via linked claim)
Categorization
- XREF: connects to: Spontaneous emissions respond to suppressors with a time constant near 15 ms; The MOC reflex restores auditory dynamic range in noisy backgrounds; Prior suppression studies may be confounded because long stimuli trigger the medial olivocochlear reflex (+4 more)
Related
- Masking measured within the efferent onset delay isolates gain reduction cleanly (similarity 0.92)
- Long suppressor durations elicit MOCR and may underestimate suppression (similarity 0.91)
- Suppression is underestimated by maskers long enough to trigger the MOCR (similarity 0.91)
- Masker duration gates whether the medial olivocochlear reflex contributes to measured gain (similarity 0.91)
- Prior suppression studies may be confounded because long stimuli trigger the medial olivocochlear reflex (similarity 0.90)
- Masker durations over 25 ms trigger efferent feedback that reduces measured suppression (similarity 0.89)
- Sound durations longer than 25 ms recruit efferent feedback that reduces measured suppression (similarity 0.89)
- Suppressor duration windows distinguish MOCR-mediated gain from cochlear mechanics. (similarity 0.88)
- Long combined maskers trigger MOCR gain reduction that underestimates true suppression (similarity 0.88)
- MOCR gain reduction masks true cochlear suppression and underestimates it (similarity 0.87)
- Measured suppression is underestimated when maskers trigger medial-olivocochlear gain reduction (similarity 0.87)
- Signal durations under the efferent onset delay isolate the efferent effect on cochlear gain (similarity 0.86)
- MOCR gain reduction interacts with suppression to reduce it (similarity 0.85)
- Spontaneous emissions respond to suppressors with a time constant near 15 ms (similarity 0.84)
- The efferent olivocochlear reflex takes 25-40 ms to begin acting (similarity 0.84)
Broader Connections
- Long suppressor durations elicit MOCR and may underestimate suppression
#corroborates(0.95) - The MOCR reduces channel compression when the opposite ear’s output rises
#expands(0.80) - Masking measured within the efferent onset delay isolates gain reduction cleanly
#qualifies(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5953