![]() ![]() As can be seen below, the sound pressure levels are quite significant in a large portion of the air domain above and outside the table. The stem of the tuning fork is in contact with a point at the center of the table. It measures 1 by 1 m and is supported at the corners. We now add a 2-cm-thick wooden table surface to the model. Sound pressure level (dB) and radiation pattern (inset) around the tuning fork. Actually, if you turn a tuning fork around its axis beside your ear, the near-silence in the 45-degree directions is striking. This is approximately the maximum feasible value if the tuning fork is not to be overloaded from a stress point of view.Īs can be seen in the figure below, the intensity of the sound decreases rather fast with the distance from the tuning fork, and also has a large degree of directionality. The amplitude of the vibration at the prong tips is set to 1 mm. By adding a boundary element representation of the acoustic field to the model, the sound pressure level in the surrounding air can be computed. The center of gravity is indicated by the blue sphere. Note that the scales differ between figures. Total displacement vectors in the first eigenmode.Īxial displacements only. The peak axial displacement is 0.03 and the displacement in the stem is 0.01. The mode is normalized so that the maximum total displacement is 1. The displacements are shown in the figures below.
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