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Thanks for your reply,With regards to the speaker is there a best wattage/size? Also this may seem a silly question but do I also need to purchase an amplifier?
I am an art student currently at the beginning on an Art, Science and Visual Thinking module. My initial research has led me to Chladni plates where sand can be used to visualise sound vibrations ...
My current aim is to create my own Chladni plate where I use a loudspeaker and something that emits a tone at certain frequencies as research ...
...I also hope to experiment with a high speed camera and perhaps oil and water to capture the patters and relations made by the sound vibrations
You say that a bowl of water may need to touch the frame of the speaker and that the node patterns would not emerge.
But Colin, RD - are these patterns created by a laser focused on a mirror being vibrated at these varying frequencies actually the node patterns that are occurring on a plate?
If an old CD player would work to amplify the sound would the same principle occur in a tv sound system? My tv has a blu-ray player connected which all the speakers are connected to for the surround sound. If I find an appropriate speaker will connecting that to my blu-ray player amplify the sound enough? I am not at home just now so can't confirm if it has an aux input, so I may have to use my tv as the input for the sound or my laptop connected through the HDMI.
Colin - In the instance of the mirror stuck to speaker cone, the laser beam and the patterns caused at varying frequencies - if these are not node patterns, what are they? Surely they must be closely related? A node pattern is formed where the stresses of resonance are least in the structure of the plate and these node patterns relate to the Schrödinger equation. If the mirror was being resonated by the frequency, a node pattern would form in powder placed on it, but the mirror is vibrating with the speaker. By all logic this should result in Doppler shift?