Temporal envelope suffices for speech while fine structure carries pitch information
Evidence
Acoustic signals can be decomposed into temporal envelope (E) and fine structure (FS). Previous studies have demonstrated that E is sufficient for speech perception (Shannon et al. 1995 ; Apoux et al. 2013 ), while FS is important for pitch perception (Smith et al. 2002 ) and lexical tone perception (Xu and Pfingst 2003 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 3381
Categorization
- DEFINE: Establishes the E/FS decomposition of acoustic signals and which is sufficient for which perceptual function.
- corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 3381
- XREF: connects to: Shifted complex tones cannot isolate pure temporal fine structure effects in pitch; Pitch may be jointly coded by temporal patterns and their cochlear location — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338; Stimulus envelope, not temporal fine structure, counts as temporal information (+14 more)
Broader Connections
- Stimulus envelope, not temporal fine structure, counts as temporal information
#contradicts(0.85) - Pitch perception involves both spectral and temporal representations of sound
#expands(0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 4638 - Shifted complex tones cannot isolate pure temporal fine structure effects in pitch
#qualifies(0.80) - Fine structure dominates lexical tone perception in normal hearing but is lost in ANSD
#expands(0.80) - Speech intelligibility depends on conserving envelope modulation through a channel
#corroborates(0.80) - Amplitude-modulated sounds split into slow-varying envelope and fast-varying fine structure
#expands(0.80) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 997 - Pitch may be jointly coded by temporal patterns and their cochlear location
#complicates(0.78) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338 - Categorical phonetic features encode EEG information the speech envelope lacks
#complicates(0.78) — Dijk, Pim van, Physiology, Psychoacoustics and…, 4429 - Low-frequency pitch judgments reflect temporal fine structure via neural phase locking
#qualifies(0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1043 - Hearing impairment disrupts both place and temporal pitch codes
#expands(0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1326 - Direct sound carries signal information uncontaminated and governs speech intelligibility
#complicates(0.72) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1729