Educational science videos - every video is reviewed to verify its accuracy and quality.
Observe the effect arising from inhaling a much denser gas than air! Due to its density, the frequency with which human vocal cords reverberate (in fact their eigenfrequency) is changed! Do not forget the obligatory handstand afterwards, otherwise you are in DANGER OF SUFFOCATION!!!
2006/07 Physikshow of the University of Bonn.