Therefore, to reduce noise and vibration, three main groups of methods may be employed, i.e., active, semi-active or passive. The aim of contemporary researchers is to minimize noise and vibration pollution in the human environment by improvement of the materials and methods.
Vibrations in the form of shocks have dangerous impact on humans in vehicles, as resonant frequencies of the human body may be excited. Low-frequency vibration, specific to the machine operator’s profession, is especially harmful and causes decrease of work efficiency. Both noise and vibration have an impact on humans. Noise exposure is a common issue, which may significantly annoy or even result in irreversible hearing loss of workers and people using noisy appliances in their everyday life.
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