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Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer

This paper presents a method of measuring the vibration patterns on facial surfaces by using a scanning laser Doppler vibrometer (LDV). The surfaces of the face, neck, and body vibrate during phonation and, according to Titze (2001), these vibrations occur when aerodynamic energy is efficiently conv...

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Detalles Bibliográficos
Autores principales: Kitamura, Tatsuya, Ohtani, Keisuke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4631026/
https://www.ncbi.nlm.nih.gov/pubmed/26579054
http://dx.doi.org/10.3389/fpsyg.2015.01682
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author Kitamura, Tatsuya
Ohtani, Keisuke
author_facet Kitamura, Tatsuya
Ohtani, Keisuke
author_sort Kitamura, Tatsuya
collection PubMed
description This paper presents a method of measuring the vibration patterns on facial surfaces by using a scanning laser Doppler vibrometer (LDV). The surfaces of the face, neck, and body vibrate during phonation and, according to Titze (2001), these vibrations occur when aerodynamic energy is efficiently converted into acoustic energy at the glottis. A vocalist's vibration velocity patterns may therefore indicate his or her phonatory status or singing skills. LDVs enable laser-based non-contact measurement of the vibration velocity and displacement of a certain point on a vibrating object, and scanning LDVs permit multipoint measurements. The benefits of scanning LDVs originate from the facts that they do not affect the vibrations of measured objects and that they can rapidly measure the vibration patterns across planes. A case study is presented herein to demonstrate the method of measuring vibration velocity patterns with a scanning LDV. The objective of the experiment was to measure the vibration velocity differences between the modal and falsetto registers while three professional soprano singers sang sustained vowels at four pitch frequencies. The results suggest that there is a possibility that pitch frequency are correlated with vibration velocity. However, further investigations are necessary to clarify the relationships between vibration velocity patterns and phonation status and singing skills.
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spelling pubmed-46310262015-11-17 Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer Kitamura, Tatsuya Ohtani, Keisuke Front Psychol Psychology This paper presents a method of measuring the vibration patterns on facial surfaces by using a scanning laser Doppler vibrometer (LDV). The surfaces of the face, neck, and body vibrate during phonation and, according to Titze (2001), these vibrations occur when aerodynamic energy is efficiently converted into acoustic energy at the glottis. A vocalist's vibration velocity patterns may therefore indicate his or her phonatory status or singing skills. LDVs enable laser-based non-contact measurement of the vibration velocity and displacement of a certain point on a vibrating object, and scanning LDVs permit multipoint measurements. The benefits of scanning LDVs originate from the facts that they do not affect the vibrations of measured objects and that they can rapidly measure the vibration patterns across planes. A case study is presented herein to demonstrate the method of measuring vibration velocity patterns with a scanning LDV. The objective of the experiment was to measure the vibration velocity differences between the modal and falsetto registers while three professional soprano singers sang sustained vowels at four pitch frequencies. The results suggest that there is a possibility that pitch frequency are correlated with vibration velocity. However, further investigations are necessary to clarify the relationships between vibration velocity patterns and phonation status and singing skills. Frontiers Media S.A. 2015-11-03 /pmc/articles/PMC4631026/ /pubmed/26579054 http://dx.doi.org/10.3389/fpsyg.2015.01682 Text en Copyright © 2015 Kitamura and Ohtani. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Psychology
Kitamura, Tatsuya
Ohtani, Keisuke
Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title_full Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title_fullStr Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title_full_unstemmed Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title_short Non-contact measurement of facial surface vibration patterns during singing by scanning laser Doppler vibrometer
title_sort non-contact measurement of facial surface vibration patterns during singing by scanning laser doppler vibrometer
topic Psychology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4631026/
https://www.ncbi.nlm.nih.gov/pubmed/26579054
http://dx.doi.org/10.3389/fpsyg.2015.01682
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