Band-widening suppression studies show inconsistent age effects on suppression
Evidence
Narrow bandpass noise centred at the signal frequency was widened by adding noise bands above, below, or above and below the signal frequency. Suppression was measured as the difference in signal threshold between the narrowest and widest noisebands. Dubno and Ahlstrom ( 2001a , b ) found less suppression with more noise above rather than below the signal frequency, and the older adults with normal hearing had less suppression than the younger adults. Older adults had minimal low-side suppression and absent high-side suppression (Dubno and Ahlstrom 2001a ). In contrast, using the band-widening technique with noise added below the signal, Gifford and Bacon ( 2005 ) found no effect of age on suppression. — Dijk, Pim van, Physiology, Psychoacoustics and…, 924
Categorization
Category: Factual Claims
- XREF: Evidence of mixed results across studies using the same technique — feeds the reader’s need for accurate empirical grounding on how aging affects cochlear nonlinearity.
Related
- High-side suppression diminishes or disappears with age (similarity 0.91)
- Cochlear suppression declines with age in both high-side and low-side components (similarity 0.87)
- Suppression estimates decrease significantly with age in both low and high-side configurations (similarity 0.86)
- Older adults show reduced cochlear two-tone suppression (similarity 0.84)
- Age-related hearing difficulty in noise stems from reduced cochlear nonlinearity, not just thresholds (similarity 0.84)
- Older adults show significantly lower cochlear gain estimates than younger adults (similarity 0.83)
- A brief transient signal with no steady state isolates cochlear suppression effects. (similarity 0.82)
- Aging significantly reduces cochlear gain estimates at multiple signal levels (similarity 0.82)
- Higher auditory thresholds predict smaller low-side suppression only at high signal levels (similarity 0.81)
- Two-tone suppression is a direct measure of cochlear nonlinearity (similarity 0.81)
- Cochlear gain declines with age before measurable threshold elevation appears (similarity 0.80)
- Auditory filters do not broaden with age in normal-hearing ears (similarity 0.80)
- Older adults lose measurable suppression entirely when maskers are long (similarity 0.80)
- Age impairs binaural envelope processing but cochlear hearing loss does not (similarity 0.79)
- Two-tone suppression is an instantaneous reduction of basilar membrane response (similarity 0.79)