So would you mind explaining what the end goal is?
One favorite way (depends if you have big enough droplets) is to shine a bright and well-directed light through a droplet and see if you can see fringing/shadowing due to the droplet. See if the shadow moves when you turn on the 'music.'
I'm really surprised that you don't notice any movement AT ALL in the droplet if the entire glass plate is visibly moving. Isn't it at least moving WITH the plate?
Basically, I want to move water on the other side of the glass using sound. I'd rather not give out any more details about the why.
In that case, you need to consider matching your power into the glass for a start - or you will not get the power transfer that you need. Also, does it have to be ultrasound and not audible sound?
It does not necessarily need to be ultrasound but I was under the impression that it would work better.
What do you mean by matching my power into the glass?
Hi, is this a set-up for ultrasound NDT testing? May I know your set up and where do you get the glass sample?