Aging degrades envelope-based binaural phase discrimination independent of hearing loss
Evidence
Thresholds for detecting IPDs in ENVp were positively correlated with age for both carrier frequencies (r = 0.62 for f c = 250 Hz; r = 0.58, for f c = 500 Hz). The correlations remained positive and significant when the effect of absolute threshold was partialled out. These results suggest that increasing age adversely affects the ability to discriminate IPDs in ENVp , independently of the effects of hearing loss. — Dijk, Pim van, Physiology, Psychoacoustics and…, 809
King et al. ( 2014 ) measured the ability to discriminate IPD using amplitude-modulated sinusoids. The IPDs were imposed either on the carrier, TFSp , or the modulator, ENVp . The carrier frequency, f c , was 250 or 500 Hz and the modulation frequency was 20 Hz. They tested 46 subjects with a wide range of ages (18–83 years) and degrees of hearing loss. The absolute thresholds at the carrier frequencies of 250 and 500 Hz were not significantly correlated with age. Thresholds for detecting IPDs in ENVp were positively correlated with age for both carrier frequencies (r = 0.62 for f c = 250 Hz; r = 0.58, for f c = 500 Hz). The correlations remained positive and significant when the effect of absolute threshold was partialled out. These results suggest that increasing age adversely affects the ability to discriminate IPDs in ENVp , independently of the effects of hearing loss. — Dijk, Pim van, Physiology, Psychoacoustics and…, 796
Categorization
- corroborated: 5 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 809; Dijk, Pim van, Physiology, Psychoacoustics and…, 796
- XREF: connects to: Binaural envelope-delay sensitivity drops once tone separation exceeds the critical band. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 911; Aging reduces envelope processing efficiency but not temporal resolution. — Dijk, Pim van, Physiology, Psychoacoustics and…, 793; Binaural temporal fine structure sensitivity declines by middle age independently of hearing thresholds — Dijk, Pim van, Physiology, Psychoacoustics and…, 1078 (+4 more)
Broader Connections
- Cochlear hearing loss raises interaural time discrimination thresholds independent of age
#contradicts(0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 817 - Monaural temporal fine structure processing declines with age even without hearing loss.
#complicates(0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 824 - Temporal-structure sensitivity declines with age even when audiograms remain normal.
#complicates(0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 793