The modeled efferent effects likely generalize to natural acoustic hearing
Evidence
Masker levels at threshold obtained using a 4-kHz masker range from about 25 to 45 dB SPL, with the greatest masker level at threshold (about 45 dB SPL) associated with the presence of a precursor with a frequency close to that of the signal. Comparing masker levels at threshold for onand off-frequency maskers in the presence of a precursor (elicits efferent activation) with masker levels obtained in the absence of precursor (absence of efferent activation), it can be seen that the greatest change in masker level at threshold (of about 20 dB) occurs when there is an on-frequency masker, rather than an off-frequency masker, and this change is greatest when the precursor frequency is the same as, or just below, the 4-kHz signal. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5972 (
#expands, via linked claim)
Categorization
- XREF: connects to: Brain efferents can dynamically adjust cochlear gain during listening; Efferent cochlear gain reduction is greatest when the precursor matches the signal frequency — Dijk, Pim van, Physiology, Psychoacoustics and…, 5972; The efferent-effect filter at 4 kHz has a Q10 of about 3.1 (+1 more)
Broader Connections
- Efferent cochlear gain reduction is greatest when the precursor matches the signal frequency
#expands(0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5972 - Brain efferents can dynamically adjust cochlear gain during listening
#expands(0.82)