hello,

i am looking for effect of the other frequencies like environmental noise, light, etc. on the vibrating system

while considering single degree of freedom system like beam having mass attached at its end

if i keep some source of sound or light with variable frequency does the system response remains unchanged?

while going through the video lec of dynamics i saw this things happen

https://www.youtube.com/watch?v=f1pxiNDTyHc

can any one explain how does it work? or any reference related to that?

it seems really interesting  to me.

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