I made a video a while back about Chladni Figures which are a way to visualise the resonance of two dimensional objects, like this square plate.
And ever since then, I've been on the lookout for other ways to visualise sound through the vibrations that they make or, the vibrations that make them.
So I was really happy to come across this one thanks to Brian Mackenwells.
He showed me this demonstration and he's allowed me to steal it for my channel.
So here's the setup, I got a Bluetooth speaker, which I've put inside this bowl.
And then, I've stretched a giant balloon over the top.
And then I've glued a fragment of mirror to the surface.
This fragment of mirror represents a sample of the kind of movement that's going on on this rubber membrane, when you play music in the bowl.
And we can interrogate that movement with a laser.
The laser reflects off the mirror and hits my wall so any movement in the mirror will change the direction of the reflected beam.
