Following up Richard's post, I believe the excessive noise attributed to 3 under is most likely caused by the limbs recovering at different times, causing excess vibration and noise.
The question is, why would this happen on a bow that was tillered for 3 under? I think the answer is also in Richard's post, and has to do with the relative pressure each finger exerts on the string. I have tried to bare shaft tune certain bows tillered for 3 under where I never could get rid of a nock high. Finally, I would just give up on it and set the nock point at 3/4". Lately, I've found that if I ease up on the pressure on my ring finger, those same bows will shoot nock level at a much lower nock point, like 1/2". Until I discovered this, I never would have believed I could tune a bow to shoot 3 under with a nock point of 1/2". The lowest I had before was 5/8", and I thought that was a fluke. If the relative pressure has that much impact on the tuning of a bow, I have to believe it would have an equal impact on the timing of limb recovery, and perhaps noise.
In other words, even though a bow is tillered for 3 under, it may tune very differently, or not tune very well at all, depending on the relative pressure of the fingers on the string. Some bows seem to be more sensitive than others in this regard.
I find it difficult to draw the bow with unequal pressure on my fingers. I have to consciously think about it and relax the pressure on my ring finger at full draw. I don't think this is a good thing to do, and I hope with time I can draw the bow with the correct pressure on each finger without thinking about it.
Topic: Three Under Noise (Read 875 times)
