Forgive my intrusion into this discussion... --- John Delacour <JD@Pianomaker.co.uk> wrote: > I now string one note only of my piano with two > strings, tune them to > the same pitch and strike them with a hammer in > such a way that while > one of the strings is tending to move the > bridge upwards the other is > tending to move the bridge downwards. <snip> >Under these > conditions the bridge cannot > be moved by the strings, since a body only > moves in reaction to a > force and in these circumstances there is a > zero force acting on the > bridge. A practical example of whether or not the above mentioned "phasing" matters is the situation we see on a routine basis with unlevel strings. When the strings of a unison are out of level and the hammer strikes them at slightly different times, you have a phasing effect which may not be terribly dissimilar to what you describe above. It is considered by most to be quite undesirable and even an untrained ear can often hear the improvment in the tonal characteristics of the sound produced by strings closer to vibrating in phase with each other (level). No offense intended. Best wishes, Brian T. ===== Brian Trout Grand Restorations 3090 Gause Blvd., #202 Slidell, LA 70461 985-649-2700 GrandRestorations@yahoo.com __________________________________________________ Do You Yahoo!? Check out Yahoo! Shopping and Yahoo! Auctions for all of your unique holiday gifts! Buy at http://shopping.yahoo.com or bid at http://auctions.yahoo.com
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