[The influence of infrasound upon human body].

The authors reported the results of an experiment which used an infrasound generator with a loudspeaker attached.Hearing threshold, body sway, respiration, pulse, blood pressure, ECG, ENG, GSR and OKN were evaluated with three different stimulations: whole body exposure, exposure by head phone and whole body exposure with ear plug.The hearing threshold showed no significant difference between whole body exposure and exposure by head phone, while it was significantly raised with whole body exposure with ear plug. Body sway was more prominent with stimulation at 15 Hz than at 10 Hz and individual variability was more marked at 15 Hz. Respiration, pulse, blood pressure, ECG, ENG, GSR and OKN showed no remarkable change. No nystagmus was seen any at exposure.