Figure 3
From: A Mathematical Model for the Sounds Produced by Knuckle Cracking
(a) Normalized acoustic pressure predicted by the model (blue curve) and measured experimentally (other curves). All curves exhibit an initial peak followed by a series of damped pressure oscillations. The inset illustrates the reasonably good agreement in the behaviour of the initial dominant peak which is responsible for the cracking sound. (b) Normalized amplitude-frequency spectrum for the simulation and the experiments. The inset shows that the dominant frequency obtained from the simulations is consistent with the frequencies obtained from the experiments.
