Efferent suppression is sometimes asymmetric, peaking for elicitors below the probe
Evidence
In most cases the tone/narrowband noise eliciting the efferent effect has maximal effect above a presentation level of 60 dB SPL, and in some cases the efferent effect has been shown to be more pronounced if the elicitor/precursor sound is about 0.5–1 octave below the probe frequency (e.g., Mott et al. 1989 ; Harrison and Burns 1993 ). However, the present study does not appear to show such a distinct asymmetry in the tuning of the efferent effect. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5980
Categorization
Category: Factual Claims
Related
- Efferent effects extend 0.5-2 octaves around the probe frequency. (similarity 0.92)
- Efferent effect is frequency-tuned, strongest nearest the test frequency (similarity 0.86)
- Efferent inhibition is strongest for tones near the cochlear site’s frequency (similarity 0.85)
- The efferent effect is frequency-tuned along the cochlear tonotopic axis in humans (similarity 0.85)
- Efferent gain reduction is strongest for tones near the target characteristic frequency. (similarity 0.83)
- Efferent cochlear gain reduction is frequency-selective around the signal frequency. (similarity 0.83)
- Human efferent reflex tuning spans about half an octave around the signal (similarity 0.82)
- Cochlear gain reduction via efferents is sharply tuned with a 1300 Hz bandwidth. (similarity 0.81)
- The efferent-effect filter at 4 kHz has a Q10 of about 3.1 (similarity 0.81)
- Suppressor tones reveal tuning curves matching neural frequency selectivity (similarity 0.81)
- Otoacoustic and psychophysical estimates of efferent gain disagree due to stimulus constraints (similarity 0.80)
- Added masking noise prevents off-frequency cues in hearing experiments (similarity 0.80)
- The modeled efferent effects likely generalize to natural acoustic hearing (similarity 0.79)
- Psychoacoustic measures probe efferent function even where OAEs fail (similarity 0.79)
- Equal-level narrow-band maskers mask less at higher centre frequencies (similarity 0.79)