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Related Experiment Video

Updated: May 14, 2026

A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants

A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants

Published on: October 4, 2015

The very first cry: a multidisciplinary approach toward a model.

Richard Nicollas¹, Jérome Vicente, David Brutin

¹Energetic Dynamics Laboratory of IUSTI (University Institute of Industrial and Thermal Systems), UMR 6595 CNRS Université de Provence, Marseille, France.

The Annals of Otology, Rhinology, and Laryngology

|January 25, 2013

Summary

The first cry of newborns is not controlled by the brain. Instead, the infant larynx generates sound through aerodynamic conditions, not vocal fold vibration alone.

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A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants

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Published on: October 4, 2015

Profiling Maternal Behavior Responses During Whole-Brain Imaging

Profiling Maternal Behavior Responses During Whole-Brain Imaging

Published on: January 24, 2025

Area of Science:

Laryngology
Bioacoustics
Neonatal Physiology

Background:

Previous research indicated that larynx-like geometries can self-generate sound.
The precise mechanisms governing laryngeal function during a newborn's first cry remain largely unknown.

Purpose of the Study:

To elucidate the biomechanical and aerodynamic processes underlying the generation of the first cry in human neonates.
To investigate the role of laryngeal structures in producing the initial vocalization.

Main Methods:

High-speed imaging and simultaneous sound recording were conducted on excised human fetal larynges (38-week term).
The distinct behaviors of the vocal folds and false vocal folds were analyzed.
Vocal fold function was examined post-resection of supraglottic structures.
Acoustic analysis compared the first cry sound with sounds produced by excised larynges.

Main Results:

The vocal folds, under the aerodynamic conditions of the first cry, do not produce sound independently.
Instead, they facilitate aerodynamic conditions that lead to the vibration of other laryngeal components.
Excised larynges produced sounds acoustically similar to the first cry.

Conclusions:

The findings suggest that the first cry lacks direct neurological control of the larynx.
The sound production mechanism appears to be primarily aerodynamic, driven by passive laryngeal structures.
A model-algorithm is proposed to explain this phenomenon.