People like doing various experiments. Good for us as we get a lot to see on the internet.
The video above posted by Redditor, ToTouchAnEmu with the title: I wanted to record a video of my speaker slowly moving, so I played a 61 hertz tone and recorded at 60fps... the result was unexpected. demonstrates a pretty unusual effect on the speakers surface, which looks really amazing.
If you are someone who’s fascinated by this kind of stuff then you are seriously going to go all ‘wow’ while watching the video above.