Mean Free Path in Acoustics
In an otherwise empty cavity, the mean free path of a single particle bouncing off the walls is:
where V is volume of the cavity and S is total inside surface area of cavity. This relation is used in the derivation of the Sabine equation in acoustics, using a geometrical approximation of sound propagation.
Read more about this topic: Mean Free Path
Famous quotes containing the words free and/or path:
“A great many will find fault in the resolution that the negro shall be free and equal, because our equal not every human being can be; but free every human being has a right to be. He can only be equal in his rights.”
—Mrs. Chalkstone, U.S. suffragist. As quoted in History of Woman Suffrage, vol. 2, ch. 16, by Elizabeth Cady Stanton, Susan B. Anthony, and Matilda Joslyn Gage (1882)
“Not once or twice in our rough island-story
The path of booty was the way to glory.”
—Anonymous.