Evidence map›Paper›PMID 40176509›Full record

ReviewPhilosophical transactions of the Royal Society of London. Series B, Biological sciences2025

Application of nonlinear dynamics theory to understanding normal and pathologic voices in humans.

Jan G Švec, Zhaoyan Zhang

Abstract readReview
In one paragraph

Review in Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

  1. Article
  2. Review
  3. Journal of the Royal Society, Interface · 2025
    Article
  4. Review
  5. Nonlinear phenomena in mammalian vocal communication: an introduction and scoping review.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  6. Vocal registers expand signal diversity in vertebrate vocal communication.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  7. 'Monkey yodels'-frequency jumps in New World monkey vocalizations greatly surpass human vocal register transitions.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  8. How to analyse and manipulate nonlinear phenomena in voice recordings.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  9. Vocal communication and perception of pain in childbirth vocalizations.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  10. Transitions and tricks: nonlinear phenomena in the avian voice.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  11. Exploring nonlinear phenomena in animal vocalizations through oscillator theory.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  12. Nonlinear phenomena in vertebrate vocalizations: mechanisms and communicative functions.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Jan G ŠvecDepartment of Experimental Physics, Faculty of Science, Palacky University Olomouc, Olomouc 77900, Czech Republic.ORCID 0000-0001-5095-7415
Zhaoyan ZhangDepartment of Head and Neck Surgery, University of California Los Angeles, Los Angeles, CA 90095-1794, USA.ORCID 0000-0002-2379-6086

Funding

Laryngeal and vocal tract strategies to reduce vocal fold contact pressureR01DC020240 · NIDCD · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI ZHAOYAN ZHANG · 2023 to 2026
$2.5M
NIDCD NIH HHS R01 DC020240Palacky University Olomouc
6 · The paper itself

Abstract

The theory of nonlinear dynamics was introduced to voice science in the 1990s and revolutionized our understanding of human voice production mechanisms. This theory elegantly explains highly complex phenomena in the human voice, such as subharmonic and rough-sounding voice, register breaks, and intermittent aphonic breaks. These phenomena occur not only in pathologic, dysphonic voices but are also explored for artistic purposes, such as contemporary singing. The theory reveals that sudden changes in vocal fold vibratory patterns and fundamental frequency can result from subtle alterations in vocal fold geometry, mechanical properties, adduction, symmetry or lung pressure. Furthermore, these changes can be influenced by interactions with supraglottal tract and subglottal tract resonances. Crucially, the eigenmodes (modes of vibration) of the vocal folds play a significant role in these phenomena. Understanding how the left and right vocal fold eigenmodes interact and entrain with each other, as well as their interplay with supraglottal tissues, glottal airflow and acoustic resonances, is essential for more sophisticated diagnosis and targeted treatment of voice disorders in the future. Additionally, this knowledge can be helpful in modern vocal pedagogy. This article reviews the concepts of nonlinear dynamics that are important for understanding normal and pathologic voice production in humans.This article is part of the theme issue 'Nonlinear phenomena in vertebrate vocalizations: mechanisms and communicative functions'.

Indexed as

Nonlinear DynamicsVocal CordsVoiceVoice DisordersHumansdysphoniaentrainmentnonlinear phenomenasingingvocal fold eigenmodesvoice production

Identifiers

PMID40176509
PMCPMC11966169

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.