Author: Zhang Dejun 1//Xia Shuangquan 2//Shi Genhuo 3//Song Xinhong 4
Affiliation: Wuhan Institute of Physics, Academia Sinica, China  //Wuhan Academy of Physical Culture, China  //Hubei Metrical Measuring Institute, China  //Wuhan Academy of Physical Culture, China 
Conference/Journal: 2nd Int Conf on Qigong
Date published: 1989
Other: Pages: 80 , Word Count: 172
In this paper, the acoustical characteristics of waiqi, which generated by the qigong teacher's palm, finger and belly, are directly measured in an anechoic chamber. The experimental results as follows: (a) the acoustic pressure level of waiqi is several decibels (dB) higher than the local noise in the frequency rang of 4-32 Hz; (b) the dynamic behaviors of acoustical signals of waiqi have the shape of pulsation, and the period of which is in rang of 2-3 seconds. The results are advantageous to probe the mechanism of waiqi and to develops simulator of waiqi.
The acoustic pressure increment from teacher Xia's waiqi is found in the frequency range 4-32 Hz, that is to say, it belongs to the infrasonic sound and low frequency audible sound. This point is quite important to probe the effects and long range propagation of waiqi, since the infrasonic sound wave has a good transmissible characteristic to different matter.
In addition, the research of dynamic behaviors of waiqi has provided forcefully scientific basis for developing waiqi medical instrument.