sound insulation wall
Sound insulation wall (an acoustic source)
Sound insulation wall (two acoustic sources,in phase)
Sound insulation wall (two acoustic sources,reverse phase)
Car and truck (two acoustic sources,in phase)
Car and truck (two acoustic sources,reverse phase)
reference S. Kagami, A. Moriyoshi, I. Fukai,
IEICE Trans. vol. J74-A, no. 3, pp. 315-322, Mar. 1991.