Standing Waves on a Compound String скачать в хорошем качестве

Standing Waves on a Compound String

A non-uniform string -- half rubber hose and half elastic string -- is driven to vibration to find the normal modes (standing wave patterns) and natural frequencies. The tension is the same along the string but the densities are different. So, the natural frequencies are NOT integer multiples of the fundamental as they would be for a uniform string. And the mode shapes are not symmetric. Instead, the local "wavelength" is shorter in thicker half and longer in the thinner half. This video clip was extracted from a lecture (10/19/2021) from my ACS 501, Elements of Acoustics and Vibration class. I posted this for my current students who are working through the compound string as a boundary conditions homework problem.