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Old 07-20-2007, 09:20 AM
Jim Jim is offline
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Join Date: Dec 2000
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Aaron has given you the most likely reason. The common name for the phenomenon is "Wolf Tone". Every acoustic stringed instrument on the planet has this effect, though in some individual instruments it is more or less pronounced than in others. Below that note on your fretboard, your guitar body and the string are vibrating in phase. Above that pitch, they are moving in counter-phase. The Wolf Tone is point at which the acoustic turbulence is transitioning from in phase to counter-phase. It is the threshold point. You can design an acoustic guitar that will minimize the Wolf Tone point by adding heavier bracing to keep the body from vibrating so much so you don't get such a pronounced transition but when you do that you start to lose the sensitivity and complexity of tone since your instrument is less lively. A guitar's designer has to make a tradeoff in their design, and the player has to make a decision if they want a dull and dead sounding overbraced acoustic with the Wolf Tone being almost silenced, or a lively and complex sounding acoustic with a noticeable Wolf Tone that they try to avoid hitting in their playing.
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Acoustics:
1995 Taylor 510
1997 Taylor Custom Shop 14 size
1998 Taylor K-65 12 string
1998 Larrivee C-10E with Mucha Lady IR/Sitka

Electrics:
1999 PRS Custom 22 Artist Package - Whale Blue/Ebony
1995 Fender Custom Shop 1960 Strat - Dakota/Maple
1997 Fender California Series Fat Strat - CAR/Maple
1968 Teisco e-110 Sunburst/Maple
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