Publikacje

Abstract:

The concept of energy harvesting is a mechanism of deriving
energy from the sources present in the environment. Using this energy will
enable wireless and portable electronic devices to be completely self-
sustaining. A variety of sources are available for energy harvesting,
including electromagnetic radiation, vibration-, sound -, and wind- energy.
The output power levels from these sources and the mechanisms involved
in energy conversion determine its possible applications. The paper
analyses the variability of the acoustic power generated by traffic volume.
The equivalent sound level was calculated by permanent automatic sound
and traffic volume monitoring stations for three time intervals. The
measurements were carried out 24 hours a day. In this study, the authors
analysed the acoustic power to be able to compare the fixed and variable
components. Standard deviation, coefficient of variation, the positional
coefficient of variation, and the quartile deviation were proposed for
performing a comparative analysis of the acoustic power scattering. The
coefficient of variation is a parameter that satisfactorily describes a variable
component of acoustic power. Uncertainties of the acoustic power
calculation were compared within the periods under analysis.

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Assessment of variability of acoustic power generated by traffic volume