Qibai, Shi, Physiological & Psychological Effects of Infrasound on Persons

Chen Yuan Huang Qibai and Hanmin Shi
School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P .R. of China

March 30 2004

In order to study the physiological and psychological effects of infrasound on person, we have measured the changes of blood pressure and heart rate and also investigated subjective feelings of subjects exposed to infrasound. Hood et al and Evans and Tempest the subjective reaction and the hearing threshold etc Mφller reported the physiological and psychological effects of infrasound (with frequency bandwidth of from 6.3 Hz to 31.5 Hz) on persons. Considering that the main resonant frequency of person’s internal organs is below 5 Hz, the study has adopted two different infrasonic conditions, about 2 Hz 110 dB (A) and 4 Hz 120 dB (A).

Two groups of subjects were used in the experiment––Group A and Group B. Group A were exposed to infrasound with about 2 Hz 110 dB for 1 hour Group B were exposed to infrasound with about 4 Hz 120 dB for 1 hour. During the experiment, noise with frequency of over 20 Hz was minimized. The physiological and psychological effects of infrasound on persons have been objectively demonstrated.

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