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Location: Phoenix AZ | Here's a page with the laser vibrometer plots. If you would like to add yours please scan it in 300 dpi reslolution jpg format and email it to me.
Dave
LASER VIBROMETER PLOTS |
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Location: Simpsonville, SC | Sorry, found explanation in another thread. |
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Location: Phoenix AZ | Three guitars now posted. This is kind of cool. Any more? |
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Location: NJ | need to hook up my scanner and as soon as I do I will get it to you.
preparing for 1000 sq ft of sod tomorrow |
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Location: Colorado Rocky Mountains | I'll send you #5 tomorrow. |
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Location: SoCal | Darren showed me the graphs from all the 47's (and the original 47) while I was in CT. They are all remarkably consistant. It's pretty interesting to see. |
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Location: Germany | Used materials and manufacturing are very consistent so I don't expect too many variations between the plots. I also would think that all OFCs sound the same, at least to my ears. But I know there are some guys out there who can perceive even slight variations.
Al, feel free to scan also the plot of #10. Would love to see it here.
Karl |
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Posts: 15654
Location: SoCal | The graphs that I would like to see are those of the original 33 slotheads. While the bodies of all the slotheads are mostly synthetic materials, I believe that they do "play in" over time and sound better and better. |
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Location: Tennessee | I'll send the plot of #6 when I get back home on Friday. |
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Location: Boise, Idaho | Just found this thread, although Tony told me about it when I visited him. I didn't see a plot in the envelope, but I must admit I was looking at all the other goodies. Charlie, even to my ears I could tell a sound difference between my OFC and Tony's. Possibly enough that after only a week of trying to play mine a few minutes each day I would be able to tell the difference by the sound. |
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Location: Boise, Idaho | If only our scanner worked. A=164.4485 at 38.332 dB B=83.8552 at 37.447 dB |
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Location: SoCal | Mark, that would make yours an 83???
Oh, well. You can be the bass man :p :D :p |
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Location: Boise, Idaho | It has no shortage on the bass end. It's obviously not as consistent as Paul says the 47s were. I don't quite understand it, but it is interesting. |
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Location: Tidal Mudflats of Virginia | Still working out the move in. Right now limited to a 28k dial-up, hope to have the scan by the end of the month...
For the statistics...
A: Freq X:167.3131 Y:-40.913
B: Freq X: 91.4176 Y:-40.313
Tim |
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January 2006
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Location: Colorado Rocky Mountains | Tupp, the plot will be e-mailed to you later, but the readings are:
A: Freq X:148.262 Y: -40.845
B: Freg X:93.0101 Y: -35.1
I have no clue what all this means. I did note that the lower reading of the original No. 47 was 99, which was the highest reading of all the original slotheads. Knowing that No. 47 is considered by many to be the best sounding of the original lot, I surmised that its higher reading had something to do with the sound. As somebody previously pointed out, these differences may be noticeable on the Laser Vibrometer printout, but probably not to our ears (at least not mine). |
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Location: Capital District, NY, USA Minor Outlying Islands | Good question Professor. If it's not too much trouble, could one of the scientists illuminate what these graphs mean. I have an inkling that they show something about the highest freq, but I thought that was measured in hertz or megahertz, with a low number being a low sound, and higher number, being a higher pitched sound.
Thanks |
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Location: NJ | The graphs merely document that your collective checking accounts have taken a major "hit" . . . |
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Location: closely held secret | ...which accounts for the high-pitched sound. |
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Location: south east Michigan | The print-outs are cool but what I'd really like to have is an m-peg, color video of a test. That is where you can really see just how dynamic the top a guitar is.
I'd use it as a screen saver.
However, it might fall under the "trade secret" and will never be seen outside the hallowed halls of the Mothership. |
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Location: Colorado | I have one of original 43....I'll send it as soon as I'm out of the dentist's chair...... |
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January 2005
Posts: 4903
Location: Phoenix AZ | Originally posted by Slipkid:
The print-outs are cool but what I'd really like to have is an m-peg, color video of a test. During the very first OFCT they ran a live test on an ADII. I'm pretty sure someone captured it on videotape.
Dave |
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January 2005
Posts: 4903
Location: Phoenix AZ | UPDATED 7/15.
Now includes guitar numbers 3, 5, 6, 7 and 8.
http://www.roundbackguitarforum.com/vibrometer.htm
Dave |
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Location: SoCal | Dave, you need to re-open the OFC side of the Ovation Gallery just so we can see who owns what and to keep track of things..... |
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January 2005
Posts: 4903
Location: Phoenix AZ | I'm working on it. It takes time to photoshop every single picture and paste Martin headstocks on all my ovation and adamas guitars.
Dave |
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July 2005
Posts: 1609
Location: Colorado | Original Slothead #43
A = X: 192.1012 Y: -39.245
B = X: 74.3071 Y: -37.607
Preparing to email to Dave |
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OFC GUITAR - LASER VIBROMETER PLOTS
