Expressive moments in communicative hand gestures often align with emphatic stress in speech. It has recently been found that acoustic markers of emphatic stress arise naturally during steady-state phonation when upper-limb movements impart physical impulses on the body, most likely affecting acoustics via respiratory activity. In this confirmatory study, participants (N = 29) repeatedly uttered consonant-vowel (/pa/) mono-syllables while moving in particular phase relations with speech, or not moving the upper limbs. This study shows that respiration-related activity is affected by (especially high-impulse) gesturing when vocalizations occur near peaks in physical impulse. This study further shows that gesture-induced moments of bodily impulses increase the amplitude envelope of speech, while not similarly affecting the Fundamental Frequency (F0). Finally, tight relations between respiration-related activity and vocalization were observed, even in the absence of movement, but even more so when upper-limb movement is present. The current findings expand a developing line of research showing that speech is modulated by functional biomechanical linkages between hand gestures and the respiratory system. This identification of gesture-speech biomechanics promises to provide an alternative phylogenetic, ontogenetic, and mechanistic explanatory route of why communicative upper limb movements co-occur with speech in humans.
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September 2020
September 08 2020
Energy flows in gesture-speech physics: The respiratory-vocal system and its coupling with hand gestures
Wim Pouw;
Wim Pouw
a)
1
Center for the Ecological Study of Perception and Action at the University of Connecticut
, 406 Babbidge Road, Storrs, Connecticut 06269, USA
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Steven J. Harrison;
Steven J. Harrison
b)
1
Center for the Ecological Study of Perception and Action at the University of Connecticut
, 406 Babbidge Road, Storrs, Connecticut 06269, USA
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Núria Esteve-Gibert;
Núria Esteve-Gibert
2
Psychology and Education Sciences at the Universitat Oberta de Catalunya
, Rambla del Poblenou, 158, 08018, Barcelona, Spain
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James A. Dixon
James A. Dixon
1
Center for the Ecological Study of Perception and Action at the University of Connecticut
, 406 Babbidge Road, Storrs, Connecticut 06269, USA
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Wim Pouw
1,a)
Steven J. Harrison
1,b)
Núria Esteve-Gibert
2
James A. Dixon
1
1
Center for the Ecological Study of Perception and Action at the University of Connecticut
, 406 Babbidge Road, Storrs, Connecticut 06269, USA
2
Psychology and Education Sciences at the Universitat Oberta de Catalunya
, Rambla del Poblenou, 158, 08018, Barcelona, Spain
a)
Also at: Donders Institute for Brain, Cognition and Behaviour at the Radboud University Nijmegen, Montessorilaan 3, 6525 HR Nijmegen, The Netherlands. Electronic mail: [email protected]
b)
Also at: Department of Kinesiology, University of Connecticut, Storrs, CT 06269, USA.
J. Acoust. Soc. Am. 148, 1231–1247 (2020)
Article history
Received:
December 02 2019
Accepted:
July 24 2020
Citation
Wim Pouw, Steven J. Harrison, Núria Esteve-Gibert, James A. Dixon; Energy flows in gesture-speech physics: The respiratory-vocal system and its coupling with hand gestures. J. Acoust. Soc. Am. 1 September 2020; 148 (3): 1231–1247. https://doi.org/10.1121/10.0001730
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