Hello, As of this moment I am trying to get in the process of writing an Extended Essay on Chladni Plates, more specifically on a circular vibrating membrane with free ends. To begin with I thought the concept could be simplified to such an extent where I could take a cross-section of the plate and decribe it as a standard standing wave, however that does not seem to be the case. I wanted explicitly to try and calculate the speed of sound thorugh the medium of the vibrating plate using the chosen frequency and using the nodal lines in order to find the wavelength. After actually doing a trial the calculations seemed inconsistent and something had to be wrong. After further discussion with my supervisor, who does not have much knowledge regarding this topic, it appears the idea of investigating a vibrating ciurcular plate would deem to be rather complex. A big issue for me is also in terms of research because so to speak all sources I find regarding the topic only considers a drum head, which means that the ends are fixed. I really want to make this topic work but I do lack any sense of direction. Is it anynone who would be able to point me in the direction of any papers or literature which talks about this? And also if possible clarify any misconceptions I seem to have about this phenomenon.