since no one said it yet....How bout pouring water on a guitar? Wouldn't that add damping?
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| definition of "Damping" ? http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=32110 |
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| Author: | munen [ Thu May 05, 2011 6:40 pm ] |
| Post subject: | definition of "Damping" ? |
hello fellas. i´ve seen that term used often refering to a wood characteristic. the dictionary definition does not clear my doubts. what does it specificaly mean when we are talking about wood? thanks!! |
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| Author: | John Mayes [ Thu May 05, 2011 6:51 pm ] |
| Post subject: | Re: definition of "Damping" ? |
The short, and unsophisticated, answer is reduction of vibrations. |
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| Author: | Howard Klepper [ Thu May 05, 2011 7:21 pm ] |
| Post subject: | Re: definition of "Damping" ? |
Conversion of kinetic energy into heat. Is that what you were asking? |
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| Author: | munen [ Thu May 05, 2011 7:30 pm ] |
| Post subject: | Re: definition of "Damping" ? |
so, a wood with a high damping would be one that absorbs energy more rapidly and therefore less efficient for acoustic purposes?? im just trying to understand how the therm applies to wood. |
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| Author: | Alain Moisan [ Thu May 05, 2011 7:54 pm ] |
| Post subject: | Re: definition of "Damping" ? |
munen wrote: so, a wood with a high damping would be one that absorbs energy more rapidly and therefore less efficient for acoustic purposes?? Pretty much. But lutherie being what it is (meaning still somewhat of a fuzzy science), great guitars have been made with high damping wood. Sometime you may even want to use high damping wood. For my flamencos, I like the wood used for the back (and sides, consequently) to have high damping since I'm looking for low sustain. |
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| Author: | jm2 [ Thu May 05, 2011 10:11 pm ] |
| Post subject: | Re: definition of "Damping" ? |
Fellas, I think you might be making damping more difficult for him to understand. It is possible to clearly define and describe damping without introducing the role of heat. |
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| Author: | meddlingfool [ Thu May 05, 2011 10:27 pm ] |
| Post subject: | Re: definition of "Damping" ? |
Crash cymbal=low damping Pillow=high damping Metaphorically speaking of course. Or in a more practical sense, in my opinion, in a manner of speaking, in general, ymmv, various disclaimers etc., A rosewood guitar (lower damping) will be ring-ier, chim-ier, reverb-ier, and things like that in comparison to the same guitar made of mahogany (higher damping), which would be warmer, softer, rounder, dryer etc. Or listen to a guitar with a mahogany top ( higher damping) vs. one with a spruce top (lower damping) and you will get the idea. At least that is my perception anyhow. All of the above words are in the OLF Scrabble Dictionary btw.... |
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| Author: | nickton [ Thu May 05, 2011 11:43 pm ] |
| Post subject: | Re: definition of "Damping" ? |
since no one said it yet....How bout pouring water on a guitar? Wouldn't that add damping?
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| Author: | meddlingfool [ Fri May 06, 2011 1:27 am ] |
| Post subject: | Re: definition of "Damping" ? |
Regular water or heavy water? |
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| Author: | klooker [ Fri May 06, 2011 5:34 am ] |
| Post subject: | Re: definition of "Damping" ? |
nickton wrote: since no one said it yet....How bout pouring water on a guitar? Wouldn't that add damping? Now you've introduced the confusion between damping and dampening. Kevin Looker |
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| Author: | munen [ Fri May 06, 2011 10:20 am ] |
| Post subject: | Re: definition of "Damping" ? |
understood. thanks |
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| Author: | mqbernardo [ Fri May 06, 2011 10:52 am ] |
| Post subject: | Re: definition of "Damping" ? |
Todd Stock wrote: Damping is dependent on frequency as well as materials...above 3500 Hz, loss due to damping increases rapidly, while at low frequencies, even woods we think of as highly damped can show pretty good sustain. i think this part is important to retain for the novice (like me). the damping amount is always frequency dependant. high frequency content tends to be more heavily absorbed by materials (be it wood or not) than low frequency/high wavelength content. easy to notice with , for example, echo : the reflected sound has always less high frequency content than the source sound, which is the same as to say it has been filtered.cheers, Miguel. |
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| Author: | John Arnold [ Tue May 10, 2011 9:03 pm ] |
| Post subject: | Re: definition of "Damping" ? |
A practical way to experience damping is to tap the wood and see how long it vibrates. High damping = short sustain. Maple has much higher damping than rosewood, and it is pretty obvious when doing the tap test. |
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