<html><head/><body><div class="mail_android_message" style="line-height: 1; padding: 0.5em">For any material, as long as you don't exceed its elastic deformation limit, it will return to its original position if deflected. It will do this forever (it's reversible). Once you exceed the elastic deformation limit, you've reached plastic deformation, and possibly compromised its structural integrity (irreversible).<br>
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I doubt sound vibration under normal playing conditions would cause plastic deformation. Your playing style, abuse of the instrument, wearing down materials due to abrasion, etc. might.<br>
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My $0.02<br>
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Justin <br>
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<meta name="viewport" content="width=device-width" /><meta http-equiv="Content-Type" content="text/vnd.ui.secure+html;charset=utf-8" /></head><body style="overflow-wrap:break-word; word-break: break-word;"><div class="mail_android_quote" style="line-height: 1; padding: 0.3em">On 03/04/2017, 10:26 AM bbob <fluxmonk@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0.8ex 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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Got any references to support this theory? I'm interested, but those three examples (vibration, burning, gravity) don't seem to be equivalent phenomena, to me.
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b
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On Sat, Mar 4, 2017 at 11:08 AM, cheater00 cheater00<span> <<a href="mailto:cheater00@gmail.com" target="_blank">cheater00@gmail.com</a>></span> wrote:<br />
<blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex;border-left: 1.0px rgb(204,204,204) solid;padding-left: 1.0ex;">
Hi,<br />
When using a bow, a horn, a guitar body, or another acoustic<br />
instrument, when the object emits sound waves its integrity is<br />
diminished in tiny amounts. Eventually it would get destroyed.<br />
<br />
Similarly to total energy that can be released by burning matter in<br />
oxygen, or total energy released when an item drops on the ground, Is<br />
there some form of "total acoustic output" that can happen over the<br />
lifetime of an object? How would you define it, theoretically?<br />
<br />
One can imagine that forced vibration has a different effect to free vibration.<br />
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