Human efferent reflex tuning spans about half an octave around the signal

Evidence

There is substantial variability in the relative contribution of suppression to ANF responses (Fig. 5a ), similar to that observed with tone stimuli in the “fractional-response” metric (e.g., Miller et al. 1997 ). There is a group of fibers (both NH and HI) across the CF axis, which show no significant suppression ( ; Fig. 5a ). These are mainly, but not exclusively, of the high-spontaneous-rate class (≥ 18 spikes s‑1 ). HI fibers in the region of greatest damage (~ 2–5 kHz) tend to have reduced suppression. Plotting vs . CF-normalized 10-dB bandwidth, we find a significant correlation between broadened tuning and loss of suppression (Fig. 5b ). Considering only CFs > 2 kHz in this linear regression increased the variance explained from 9.1 to 18.4 %. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871 (#complicates, via linked claim)

Categorization

• XREF: connects to: Human efferent tuning measured psychoacoustically matches otoacoustic-emission measures; Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871; Efferent suppression is sometimes asymmetric, peaking for elicitors below the probe (+1 more)

Related

• Suppression tuning curves mirror inner-ear neurophysiological frequency selectivity (similarity 0.93)
• Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers (similarity 0.90)
• Noise damage degrades frequency separation more severely than sensitivity (similarity 0.87)
• Suppressor tones reveal tuning curves matching neural frequency selectivity (similarity 0.83)
• Human efferent tuning measured psychoacoustically matches otoacoustic-emission measures (similarity 0.82)
• Efferent suppression is sometimes asymmetric, peaking for elicitors below the probe (similarity 0.82)
• The efferent effect is frequency-tuned along the cochlear tonotopic axis in humans (similarity 0.82)
• Suppressor tones that reduce SOAEs map the ear’s fine frequency selectivity (similarity 0.82)
• Cochlear suppression is essential for coding complex sounds but poorly characterized in hearing loss (similarity 0.81)
• Psychoacoustic tuning curves directly reflect cochlear mechanical processing. (similarity 0.81)
• Conductive hearing loss shifts tuning curves upward without degrading frequency resolution. (similarity 0.81)
• Noise-induced hearing loss reduces neural suppression in proportion to tuning broadening (similarity 0.80)
• Efferent effects extend 0.5-2 octaves around the probe frequency. (similarity 0.80)
• Higher auditory thresholds predict smaller low-side suppression only at high signal levels (similarity 0.80)
• Noise-induced hearing loss eliminates high-side suppression in some broadly tuned fibers (similarity 0.79)

Broader Connections

• Efferent suppression is sometimes asymmetric, peaking for elicitors below the probe #qualifies (0.85)
• Suppression tuning curves mirror inner-ear neurophysiological frequency selectivity #corroborates (0.80)
• Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers #complicates (0.78) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871