What is going on?
The original blaster sounds heard in the Star Wars were made by the foley artist Ben Burtt who repetively hit the high tension wires of a radio mast with a wrench! These sound samples were then taken back to the studio to be eventually heard on the film's soundtrack.
In the case of the metal slinky and the styrofoam cup, you;re simple transferring vibrations up the slinky into the styrofoam which also then vibrates. The metal slinky vibrates against foam and creates part of the buzz that you hear, with the rest of the sound being formed by the foam itself vibrating and the sounds echoing within the cup. the larger air space within the cup caused the sound to amplify.
Want to know more about waves?
Fizzics runs Science of Sound school workshops.
Find out more here!
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