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用高于听阈２０ｄＢ的声级对４０名男人和２０名女人进行了次声暴露。试验对部分受试者的血压和脉博均有影响。特别在频率为４Ｈｚ时，血压的异常概率出现了最大值。再用１２５ｄＢ的固定声级对另外２０名男人进行的次声暴露也得到了同样的结果。这表明除听党外次声可影响一些非听觉系统，特别象心血管。
Forty men and 20 women underwent infrasound exposure at a sound level higher than the listening threshold of 20 dB. Test on some subjects have an impact on blood pressure and pulse. Especially at a frequency of 4Hz, the maximum probability of abnormal blood pressure appears. The same result was obtained with infrasound exposure to another 20 men with a fixed sound level of 125 dB. This shows that in addition to listening to the party infrasound can affect some non-auditory system, especially like cardiovascular.