| Grant number: | 18/02664-7 |
| Support Opportunities: | Regular Research Grants - Publications - Scientific article |
| Start date: | June 01, 2018 |
| End date: | November 30, 2018 |
| Field of knowledge: | Health Sciences - Medicine |
| Principal Investigator: | Vitor Engrácia Valenti |
| Grantee: | Vitor Engrácia Valenti |
| Host Institution: | Faculdade de Filosofia e Ciências (FFC). Universidade Estadual Paulista (UNESP). Campus de Marília. Marília , SP, Brazil |
Abstract
Previous studies have described significant impact of different types of noise on the linear behaviour of heart rate variability (HRV). However, there are few studies regarding the complexity of HRV during exposure to traffic noise. In this study, we evaluated the complexity of HRV during traffic noise exposure. We analysed 31 healthy female students aged between 18 and 30 years old. Volunteers remained at rest seated under spontaneous breathing during 20 minutes with an earphone turned off and then the volunteers were exposed to traffic noise through an earphone for a period of 20 minutes. The traffic noise was recorded from a very busy city street and the sound was comprised of car, bus, trucks engineers and horn (71-104 dB). We observed no significant changes in the linear analysis of HRV. CFP3 (Cohen's d=1.28, large effect size) and CFP6 (Cohen's d=1.11, large effect size) parameters of chaotic global analysis, Shannon (Cohen's d=1.13, large effect size), Renyi (Cohen's d=1.06, large effect size) and Tsallis (Cohen's d=1.14, large effect size) entropies significantly increased (p<0.005) during traffic noise exposure. In conclusion, traffic noise under laboratory conditions increased the complexity of HRV through chaotic global analysis and some measures of entropy in healthy females. (AU)
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