Research Article| Volume 37, ISSUE 3, P332-338, May 2023

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Comparing the Effects of Self-Generated and Platform-Generated Whole Body Vibration on Vocal Fatigue

  • Edwin M.-L. Yiu
    Address correspondence & reprint request to: Edwin M.-L. Yiu, Voice Research Laboratory, Human Communication, Development, and Information Sciences, The University of Hong Kong, Pokfulam, Hong Kong.
    Voice Research Laboratory, Human Communication, Development, and Information Sciences, The University of Hong Kong, Pokfulam, Hong Kong
    Search for articles by this author
  • Steven C.H. Lee
    Voice Research Laboratory, Human Communication, Development, and Information Sciences, The University of Hong Kong, Pokfulam, Hong Kong
    Search for articles by this author



      A whole body vibration platform using vertical oscillation has been shown to be efficacious in reducing vocal fatigue in adults. This study aimed to investigate whether this platform-generated whole body vibration was unique in reducing vocal fatigue by comparing it with self-generated whole body vibration.


      Twenty-four female adults (mean age = 23.96 years) were randomly assigned to one of the following three groups: a machine-generated whole body vibration group (N = 8), a self-generated whole body vibration group (N = 8), and a placebo vocal resting group (N = 8). All participants performed a karaoke singing task for at least 95 minutes. Each participant received 10 minutes of platform-generated vibration, self-vibration, or sham localised vibration (placebo group with basically voice rest only), according to their group allocation. Vocal function ability, measured by the highest fundamental frequency produced, and a self-reported vocal fatigue score were evaluated at three time points: baseline (prefatigue), after the singing task (post-fatigue) and post-vibration.


      The study revealed that machine-generated whole body vibration was significantly better at improving vocal fatigue than self-generated whole body vibration or voice rest.


      The findings support previous research that machine-generated whole body vibration is effective in reducing vocal fatigue. The non-significant results of self-generated whole body vibration in terms of relieving vocal fatigue suggest that inadequate vibration frequency or amplitude together with leg muscle fatigue may have been the main factor of ineffectiveness.

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