Cochlear hearing loss spares envelope processing but amplifies perceived fluctuation via recruitment

Evidence

Although the results of Hawkins and Wightman ( 1980 ), described in Sect. 3.3 , suggested that hearing loss adversely affected the discrimination of ITD carried in ENVp , King et al. ( 2014 ) found that thresholds for detecting IPDs in ENVp were not significantly correlated with absolute thresholds. Also, Léger et al. ( 2015 ) reported that thresholds for detecting IPDs in ENVp were similar for subjects with normal and impaired hearing (both groups had a wide range of ages). Overall, the results suggest that hearing loss does not markedly affect the ability to process binaural ENV cues. — Dijk, Pim van, Physiology, Psychoacoustics and…, 822 (#corroborates, via linked claim)

Our Wiener-kernel approach demonstrated reduced suppression in ANF responses from HI animals, which was correlated with a loss of frequency selectivity. These HI animals also exhibited reduced magnitude DPOAEs: additional evidence of reduced compressive nonlinearity. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3878 (#contradicts, via linked claim)

Categorization

  • corroborated: 2 independent passages support this claim
  • XREF: connects to: Recruitment can explain why loudness summation is absent in noise-induced hearing loss — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1960; Presbyacusis shows frequency-dependent recruitment strongest at high frequencies; Broader cochlear filters preserve envelope modulation power while electrode summation in CIs reduces it (+5 more)

Broader Connections