Tyndall, John, 1820-1893 · New York : Appleton · leaf 181
re Plates. And now let us look a little more closely into themechanism of these vibrations. The manner in which abar free at both ends divides itself when it vibrates transversely has been already explained. Rectangular piecesof glass or of sheet metal—the glass strips of the har-monica, for… … VIBRATIONS OF SQUARE PLATES. ]73 which the rectangle, looked at edgeways, bends up anddown when it is set in vibration.1 For the sake of plain-ness the bending is greatly exagger- fig. 69.ated. The figures I and c indicate —B—IMBMthat the vibrating parts of the plate BISBHhSBI alternately rise…
Sound
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