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Articulation and Dynamics Influence the Perceptual Attack Time of Saxophone Sounds.

ABSTRACT: Perceptual attack time (PAT) is defined as the moment when the most salient rhythmical feature of a sound is perceived. This paper focuses on the PAT of saxophone sounds, investigating how the location of this point in time changes when a note is played with different characteristics. Nine saxophone sounds that differ in articulation and dynamics were examined. Ground truth for PAT was determined in a synchronization judgment experiment with 40 participants. Articulation (p < 0.001, ?² = 0.316), dynamics (p < 0.001, ?² = 0.098), and their interaction (p < 0.001, ?² = 0.094) affected the placement of the PAT. The onset rise time, which has been used as a predictor for PAT in earlier studies, was only weakly correlated with PAT (r = 0.143, p = 0.006).

SUBMITTER: Bechtold TA

PROVIDER: S-EPMC6166322 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Articulation and Dynamics Influence the Perceptual Attack Time of Saxophone Sounds.

Bechtold Toni Amadeus TA Senn Olivier O

Frontiers in psychology 20180924

Perceptual attack time (PAT) is defined as the moment when the most salient rhythmical feature of a sound is perceived. This paper focuses on the PAT of saxophone sounds, investigating how the location of this point in time changes when a note is played with different characteristics. Nine saxophone sounds that differ in articulation and dynamics were examined. Ground truth for PAT was determined in a synchronization judgment experiment with 40 participants. Articulation (<i>p</i> < 0.001, η<sup ...[more]

PMID: 30319480

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Project description:Auditory signals arrive at the ear as a mixture that the brain must decompose into distinct sources based to a large extent on acoustic properties of the sounds. An important question concerns whether listeners have voluntary control over how many sources they perceive. This has been studied using pure high (H) and low (L) tones presented in the repeating pattern HLH-HLH-, which can form a bistable percept heard either as an integrated whole (HLH-) or as segregated into high (H-H-) and low (-L-) sequences. Although instructing listeners to try to integrate or segregate sounds affects reports of what they hear, this could reflect a response bias rather than a perceptual effect. We had human listeners (15 males, 12 females) continuously report their perception of such sequences and recorded neural activity using MEG. During neutral listening, a classifier trained on patterns of neural activity distinguished between periods of integrated and segregated perception. In other conditions, participants tried to influence their perception by allocating attention either to the whole sequence or to a subset of the sounds. They reported hearing the desired percept for a greater proportion of time than when listening neutrally. Critically, neural activity supported these reports; stimulus-locked brain responses in auditory cortex were more likely to resemble the signature of segregation when participants tried to hear segregation than when attempting to perceive integration. These results indicate that listeners can influence how many sound sources they perceive, as reflected in neural responses that track both the input and its perceptual organization.SIGNIFICANCE STATEMENT Can we consciously influence our perception of the external world? We address this question using sound sequences that can be heard either as coming from a single source or as two distinct auditory streams. Listeners reported spontaneous changes in their perception between these two interpretations while we recorded neural activity to identify signatures of such integration and segregation. They also indicated that they could, to some extent, choose between these alternatives. This claim was supported by corresponding changes in responses in auditory cortex. By linking neural and behavioral correlates of perception, we demonstrate that the number of objects that we perceive can depend not only on the physical attributes of our environment, but also on how we intend to experience it.

Dataset Information

Articulation and Dynamics Influence the Perceptual Attack Time of Saxophone Sounds.

Publications

Articulation and Dynamics Influence the Perceptual Attack Time of Saxophone Sounds.

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