Fine structure dominates lexical tone perception in normal hearing but is lost in ANSD

Evidence

The median tone perception performance was 97.2, 86.5, and 62.8 % correct, respectively for the three groups. The performance slightly reduced for the subjects with SNHL, while the ANSD subjects had dramatic decreases in their tone perception performance with a very large individual variability. The right panel of Fig. 1 plots the mean percentages and standard deviations of tone perception responses to the chimeric tone tokens. The subjects with NH relied on FS nearly entirely to perceive lexical tones regardless of E. In comparison with the NH subjects, the subjects with SNHL depended more on E cues to perceive tones, as they had impaired ability to use FS. In contrast to the finding in the NH and SNHL subjects, only 26.5 % of the tone responses were consistent with the FS of the chimeric tone tokens for the ANSD subjects, indicating that the ANSD subjects had more severely impaired ability to use FS in tone perception. On the other hand, the ANSD subjects relied more heavily on E cues in perceiving lexical tones, indicating that the ability of the ANSD subjects to use E cues for lexical tone perception still remained at a reasonable level. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3388 (#corroborates, via linked claim)

We know that listeners with SNHL have disruptions to the place code, particularly in the form of reduced frequency selectivity. Consequently, to the extent that the place code is responsible for the pitch of sounds, disruptions to pitch perception are expected. Further, we can measure the amount of disruption to the place code in listeners with hearing loss, using our tools to measure frequency selectivity. Broadening of frequency selectivity would impact the ability of listeners with hearing loss to select resolved harmonic peaks, thereby impacting pitch perception. Psychophysical experiments also have demonstrated disruption to the temporal code in listeners with hearing loss (Hopkins & Moore, 2011), suggesting that hearing impairment may alter both the place and temporal codes for pitch. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1326 (#expands, via linked claim)

Categorization

• XREF: connects to: DLF thresholds reflect temporal fine structure processing, not frequency selectivity; Temporal envelope suffices for speech while fine structure carries pitch information — Dijk, Pim van, Physiology, Psychoacoustics and…, 3381; SNHL impairs fine-structure use through poor frequency resolution while ANSD impairs temporal resolution — Dijk, Pim van, Physiology, Psychoacoustics and…, 3380 (+5 more)

Related

• Fine-structure cues carry Mandarin tone perception, not envelope cues (similarity 0.93)
• Normal-hearing listeners perceive Mandarin tones via fine structure, impaired ones via envelope (similarity 0.92)
• Increasing sensorineural hearing loss shifts tone perception from fine structure to envelope cues (similarity 0.91)
• DLF thresholds reflect temporal fine structure processing, not frequency selectivity (similarity 0.91)
• Impaired temporal resolution degrades fine-structure pitch processing more than reduced frequency selectivity does (similarity 0.89)
• SNHL impairs fine-structure use through poor frequency resolution while ANSD impairs temporal resolution (similarity 0.89)
• Normal hearing relies on fine structure for tones; neural disease forces reliance on envelope (similarity 0.88)
• Temporal envelope suffices for speech while fine structure carries pitch information (similarity 0.84)
• Valence perception relies solely on pitch, unaffected by hearing loss or aids (similarity 0.84)
• Mandarin tone perception accuracy falls from 97 percent to 63 percent in auditory neuropathy (similarity 0.84)
• Huggins pitch and temporal-structure tasks share variance that ITD lateralization does not. (similarity 0.83)
• Sensorineural and auditory neuropathy hearing losses impair opposite spectral and temporal abilities (similarity 0.83)
• Envelope and fine structure are mathematically orthogonal but not perceptually independent (similarity 0.82)
• Frequency difference limens index temporal fine structure processing at low and medium frequencies. (similarity 0.82)
• Hearing impairment disrupts both place and temporal pitch codes (similarity 0.81)

Broader Connections

• Fine-structure cues carry Mandarin tone perception, not envelope cues #corroborates (0.95) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3388
• Frequency difference limens index temporal fine structure processing at low and medium frequencies. #expands (0.80)
• Hearing impairment disrupts both place and temporal pitch codes #expands (0.75) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1326