Voice acoustic profile of males exposed to occupational infrasound and low-frequency noise

  title={Voice acoustic profile of males exposed to occupational infrasound and low-frequency noise},
  author={Ana P Mendes and {\'I}ris Bonança and Ana Jorge and Mariana Alves-Pereira and Nuno A A Castelo Branco and Marlene Caetano and Nadia Oliveira and Andreia Graça and Carolina Santos and Renata Ferraria},
  journal={Journal of Laryngology and Voice},
  pages={12 - 20}
Background: Vibroacoustic disease (VAD) is a systematic pathology characterized by the abnormal growth of extra-cellular matrices in the absence of inflammatory processes, namely collagen and elastin, both of which are abundant in the basement membrane zone of the vocal folds. VAD can develop due to long-term exposure to infrasound and low-frequency noise (ILFN, < 500 Hz). Mendes et al. (2006, 2008 and 2012) revealed that ILFN-exposed males and females presented an increased fundamental… 
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Audiological, Phonatory and Cardiac Correlates of Individuals Exposed to Low-Frequency Noise or at Risk of Vibroacoustic Disease

The present study found a significant difference in shimmer and harmonics-to-noise ratio (HNR) values, which indicate that LFN had an adverse impact on the high-frequency threshold.



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These perturbation measure patterns may be indicative of histological changes within the vocal folds as a result of ILFN-exposure and suggest that voice acoustic analysis may be an important tool for confirming IL FN-induced health effects.

Voice acoustic patterns of patients diagnosed with vibroacoustic disease.

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This classification should be capable of assessing work fitness, and is a primary approach to a complex and multidisciplinary problem with implications in diagnosis, prevention and disability compensation within VAD.