Masker durations over 25 ms trigger efferent feedback that reduces measured suppression

Evidence

It is possible that previous psychoacoustic studies of suppression underestimated the amount of suppression by using maskers that were long enough to elicit the medial olivocochlear reflex (MOCR). The MOCR is a sound-elicited efferent feedback loop that reduces OHC amplification or gain (Cooper and Guinan 2006 ). Gain starts to be affected approximately 25 ms after elicitor onset. — Dijk, Pim van, Physiology, Psychoacoustics and…, 921

Categorization

• DEFINE: Defines the medial olivocochlear reflex as a sound-elicited efferent feedback loop reducing OHC gain.
• XREF: Connects to the reader’s standing interest in how efferent/feedback mechanisms shape perceptual estimates — a measurement-artifact mechanism.