Noise damage degrades frequency separation more severely than sensitivity

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 (#expands, via linked claim)

Categorization

• XREF: connects to: Noise damage accumulates as an integrated dose where loudness trades against duration; Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871; Hearing damage widens acoustic filter bandwidth, impairing speech separation and sensitivity

Related

• Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers (similarity 0.91)
• Suppression tuning curves mirror inner-ear neurophysiological frequency selectivity (similarity 0.88)
• Human efferent reflex tuning spans about half an octave around the signal (similarity 0.87)
• Noise-induced hearing loss reduces neural suppression in proportion to tuning broadening (similarity 0.85)
• Hearing damage widens acoustic filter bandwidth, impairing speech separation and sensitivity (similarity 0.83)
• Broad filters and lost suppression increase masking and blur spectral contrasts. (similarity 0.82)
• Higher auditory thresholds predict smaller low-side suppression only at high signal levels (similarity 0.82)
• Noise-damaged cochleas keep low-side suppression normal while high-side thresholds rise (similarity 0.81)
• Narrow critical bandwidths at low frequencies reduce hearing sensitivity via noise fluctuations (similarity 0.81)
• Noise-induced hearing loss reduces several independent markers of cochlear compression (similarity 0.81)
• Wider auditory filters and steeper cochlear compression reduce noise-induced hearing loss. (similarity 0.81)
• Cochlear suppression is essential for coding complex sounds but poorly characterized in hearing loss (similarity 0.81)
• Noise-induced hearing loss eliminates high-side suppression in some broadly tuned fibers (similarity 0.81)
• Impaired frequency selectivity and lost suppression increase masking and reduce spectral contrasts (similarity 0.81)
• High-frequency auditory nerve fibers receive far more broadband noise power than low-frequency fibers. (similarity 0.81)

Broader Connections

• Broadened frequency tuning correlates with loss of suppression in auditory nerve fibers #expands (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3871