Temporal envelope processing is critical for speech comprehension, which is known to be
affected by normal aging. Whereas the macaque is an excellent animal model for human …

The mammalian auditory cortex is necessary to resolve temporal features in rapidly-
changing sound streams. This capability is crucial for speech comprehension in humans …

This research was guided by the working hypothesis that the aging auditory system
progressively loses its ability to process rapid acoustic transients efficiently, and in elderly …

Older adults frequently report they can hear what is said but cannot understand the
meaning, especially in noise. This difficulty may arise from the inability to process rapidly …

Age-related hearing loss (presbycusis) is a chronic health condition that affects one-third of
the world population. One hallmark of presbycusis is a difficulty hearing in noisy …

Age-related impairments in the primary auditory cortex (A1) include poor tuning selectivity,
neural desynchronization, and degraded responses to low-probability sounds. These …

The compromised abilities to localize sounds and to understand speech are two hallmark
deficits in aged individuals. The auditory cortex is necessary for these processes, yet we …

We recorded from middle–lateral (ML) and primary (A1) auditory cortex while macaques
discriminated amplitude-modulated (AM) noise from unmodulated noise. Compared with A1 …

Many older listeners have difficulty understanding speech in noise, when cues to speech-
sound identity are less redundant. The amplitude envelope of speech fluctuates dramatically …

Conflicting results have led to different views about how temporal modulation is encoded in
primary auditory cortex (A1). Some studies find a substantial population of neurons that …