Standardization of infrasounds and low‐frequency noises for health benefits on humans

Annoyances from low‐frequency noises and infrasound are effects of using technologies, transportation, manufacturing equipment, and large air‐condition systems. Present developed procedures for evaluations of annoyance of low‐frequency noise (LFN) on humans and occupational health are based on international and national standards. Comparisons show that there is a large difference between permitted values of acoustic pressure levels used. These standards are based on levels of thresholds heard by the human auditory system and subjective observations of impacts from vibrations of infrasound waves on the human body. A newly discovered phenomenon shows a follow‐up effect in the brain and is an important reason to check and investigate attenuation of infrasound, especially near and below 10 Hz. Previous investigations showed that nonlinear reaction is observed according to the external infrasound field pressure on the human body. New studies need to investigate electrical reactions of the human brain and elect...