Long suppressor durations elicit MOCR and may underestimate suppression

Evidence

When suppression is measured with combined maskers long enough to elicit MOCR-induced gain reduction, suppression may be underestimated. However, even when measured with the shorter combined maskers, older adults had less suppression than younger adults. Evidence from animal studies suggests that gain reduction from the MOCR and suppression interact, resulting in decreased suppression (Winslow and Sachs 1987 ; Kawase et al. 1993 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 959 (#corroborates, via linked claim)

In all suppression conditions tested, there were significant differences at the p < 0.05 level between suppression estimates obtained with short and long combined maskers. There was a significant difference between low-side suppression estimates obtained with short [M = 7.49, SD = 5.34] and long combined maskers [M = 4.54, SD = 5.57] at the 10-dB SL signal level [t (9) = 2.94, p = 0.017] and between short [M = 14.33, SD = 9.33] and long combined maskers [M = 8.25, SD = 8.42] at the 50-dB SPL signal level [t (9) = 3.41, p = 0.008]. — Dijk, Pim van, Physiology, Psychoacoustics and…, 940 (#expands, via linked claim)

Categorization

• XREF: connects to: Spontaneous emissions respond to suppressors with a time constant near 15 ms; Suppression is underestimated by maskers long enough to trigger the MOCR; MOCR activation during long stimuli can reduce measured suppression (+4 more)

Related

• Suppression is underestimated by maskers long enough to trigger the MOCR (similarity 0.94)
• Prior suppression studies may be confounded because long stimuli trigger the medial olivocochlear reflex (similarity 0.93)
• Short maskers yield significantly larger suppression estimates than long ones (similarity 0.92)
• Long combined maskers trigger MOCR gain reduction that underestimates true suppression (similarity 0.92)
• Measured suppression is underestimated when maskers trigger medial-olivocochlear gain reduction (similarity 0.92)
• MOCR activation during long stimuli can reduce measured suppression (similarity 0.91)
• Spontaneous emissions respond to suppressors with a time constant near 15 ms (similarity 0.91)
• Masker duration gates whether the medial olivocochlear reflex contributes to measured gain (similarity 0.91)
• Sound durations longer than 25 ms recruit efferent feedback that reduces measured suppression (similarity 0.89)
• Masker durations over 25 ms trigger efferent feedback that reduces measured suppression (similarity 0.89)
• MOCR gain reduction masks true cochlear suppression and underestimates it (similarity 0.89)
• Suppressor duration windows distinguish MOCR-mediated gain from cochlear mechanics. (similarity 0.89)
• Measuring suppression with short suppressor tones reveals more suppression than long tones (similarity 0.88)
• MOCR gain reduction interacts with suppression to reduce it (similarity 0.87)
• Medial olivocochlear reflex suppression requires maskers longer than 20 ms (similarity 0.86)

Broader Connections

• Prior suppression studies may be confounded because long stimuli trigger the medial olivocochlear reflex #expands (0.95)
• Short maskers yield significantly larger suppression estimates than long ones #expands (0.90) — Dijk, Pim van, Physiology, Psychoacoustics and…, 940
• Measured suppression is underestimated when maskers trigger medial-olivocochlear gain reduction #corroborates (0.90) — Dijk, Pim van, Physiology, Psychoacoustics and…, 959
• Masking measured within the efferent onset delay isolates gain reduction cleanly #responds-to (0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5953