There are inaudible waves sound for person Infradźwięki, frequency is too low which , in order to our ear has gotten back it . We call notion according to polish norm sounds infradźwięków infradźwiękami or noise, spectrum is included which in range from 2 for 16 Hz Hz, we call sounds according to other sources infradźwiękami or noise, spectrum is included which in range from 1 for 20 Hz Hz. stir with reference to artificial origin infradźwięków, notion of noise introduce infradźwiękowego and noise. Characteristic may outsized length wave Infradźwięki 17 .m - over, suppress can break up on as result considerable distance slightly. There is second problem through acoustic screens weak suppressing . It is possible to divide sources of sources on natural infradźwięków and artificial natural volkanoes, booms, strong wind, earthquakes, big waterfalls, artificial car vehicles heavy mainly as well as aircraft, industry , vacuum pumps and gas, towers wiertnicze, turbodmuchawy, explosions, it stir bridges, fix-ups cooling and warming air, tower cooling, pipelines. They are taken advantage by too salty Infradźwięki and multifishes for communication on big distance. They have found employment in medicine infradźwięki, in some specialistic therapeutic instruments. Become over interaction on animals interaction of research lead mainly infradźwięków, therefore, it is not learned influence on person exactly infradźwięków. Many elaboration indicate, can take a stand at exposing to high levels infradźwięków sense of oppression in ears, discomfort, excessive tiring ,sleepiness and disturbances of proficiency psychomotorycznej and even physiological function apathy and depression. However, does not have reliable indicative research on harmfulness in daily life of source taking a stand infradźwięków. Exposing to such very high level type of noise can be dangerous for health only.
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