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Impaired temporal resolution degrades fine-structure pitch processing more than reduced frequency selectivity does

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tagsja-picks, question, xref, deepthinking, define, causal_relationships, trade, corroborated, category/causal-relationships
aliases@van_dijk_physiology_2016, loc. 3377

5 min read

Impaired temporal resolution degrades fine-structure pitch processing more than reduced frequency selectivity does

Evidence

The results showed that the SNHL listeners had reduced frequency selectivity, but intact temporal resolution ability, while the ANSD listeners had degraded temporal resolution ability, but intact frequency selectivity. In comparison with the SNHL listeners, the ANSD listeners had severely degraded ability to process the FS cues and thus their ability to perceive lexical tone mainly depended on the ability to use the E cues. These results suggested that, in comparison with the detrimental impact of the reduced frequency selectivity, the impaired temporal resolution may lead to more degraded FS processing in pitch perception. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3377

This may imply that poor temporal resolution rather than the frequency resolution exerts the major detrimental effects on FS cue processing for pitch perception. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3380

The fine structure (FS) cues in the speech signals play a dominant role in lexical tone perception (Xu and Pfingst, 2003 ; Wang et al. 2011 ). The temporal envelope (E) cues contribute to tone perception when the FS cues are not available (Xu et al. 2002 ; Kong and Zeng 2006 ; Xu and Zhou 2011 ). Experiment I of the present study demonstrated that the listeners with ANSD had great deficits in using the FS cues for lexical tone perception, which resulted in great difficulties in perceiving lexical tones for the ANSD listeners. Even though the ability of the listeners with ANSD to use E cues for lexical tone perception remained at a reasonable level, this level of performance was much lower in comparison with that of the NH listeners. The NH listeners could utilize the FS cues and achieve perfect tone perception performance. The tone perception performance in the listeners with ANSD was also lower than that in the listeners with SNHL who were still able to use the FS cues for tone perception to some extent. An earlier report has shown that the ability to use the FS cues for tone perception is negatively correlated with the degree of hearing loss in listeners with SNHL (Wang et al. 2011 ). Experiments II and III evaluated the frequency resolution and temporal resolution, respectively for the subjects with SNHL and ANSD. Consistent with previous studies, the listeners with SNHL in the present study had poor frequency resolution whereas a majority of the listeners with ANSD had normal frequency resolution. On the other hand, a majority of the listeners with ANSD had poor temporal resolution whereas the listeners with SNHL had normal temporal resolution. This may imply that poor temporal resolution rather than the frequency resolution exerts the major detrimental effects on FS cue processing for pitch perception. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3409

Experiments II and III evaluated the frequency resolution and temporal resolution, respectively for the subjects with SNHL and ANSD. Consistent with previous studies, the listeners with SNHL in the present study had poor frequency resolution whereas a majority of the listeners with ANSD had normal frequency resolution. On the other hand, a majority of the listeners with ANSD had poor temporal resolution whereas the listeners with SNHL had normal temporal resolution. This may imply that poor temporal resolution rather than the frequency resolution exerts the major detrimental effects on FS cue processing for pitch perception. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3411

SNHL listeners had reduced frequency selectivity, but intact temporal resolution ability, while the ANSD listeners had degraded temporal resolution ability, but intact frequency selectivity. In comparison with the SNHL listeners, the ANSD listeners had severely degraded ability to process the FS cues and thus their ability to perceive lexical tone mainly depended on the ability to use the E cues. These results suggested that, in comparison with the detrimental impact of the reduced frequency selectivity, the impaired temporal resolution may lead to more degraded FS processing in pitch perception. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3377

Categorization

  • QUESTION: This is a surprising causal claim — that temporal-resolution deficits hurt fine-structure pitch processing more than frequency-resolution deficits. Worth chasing the mechanism: why would timing deficits degrade FS extraction more than spectral smearing?
  • XREF: Connects to the core theme of this book collection: the envelope/fine-structure dichotomy (Smith et al. auditory chimeras), and to the reader’s interest in how degraded timing vs. spectral cues dissociate in hearing loss. — connects to: Frequency difference limens index temporal fine structure processing at low and medium frequencies.; DLF thresholds reflect temporal fine structure processing, not frequency selectivity; Low-frequency pitch judgments reflect temporal fine structure via neural phase locking — Dijk, Pim van, Physiology, Psychoacoustics and…, 1043 (+8 more)
  • DEEPTHINKING: A genuinely counterintuitive mechanistic claim — that pitch’s fine-structure cue processing depends on temporal rather than spectral resolution — that reframes how we think about the physiology behind pitch perception.
  • DEFINE: Distinguishes fine structure (FS) from temporal envelope (E) cues and ANSD from SNHL — clarifies the core technical scheme of the chapter.
  • corroborated: 8 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 3377; Dijk, Pim van, Physiology, Psychoacoustics and…, 3380; Dijk, Pim van, Physiology, Psychoacoustics and…, 3409 (+1 more)

Broader Connections

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