Del wrote: > Drilling a > few holes in the body of a bass bridge generally will not affect mass enough > to make an audible change in the tone quality of the typical piano. Yeah, but tell that to the Director of Marketing! Terry Farrell ----- Original Message ----- From: "Barbara J. Fandrich" <pianobuilders@olynet.com> To: "Pianotech" <pianotech@ptg.org> Sent: Thursday, March 27, 2003 2:06 PM Subject: Re: more bridge design > > > > ----- Original Message ----- > > From: "Don" <pianotuna@accesscomm.ca> > > To: "Pianotech" <pianotech@ptg.org> > > Sent: Wednesday, March 26, 2003 8:18 AM > > Subject: Re: more bridge design > > > > > > > Hi David, > > > > > > I would not call 30 pounds of downbearing a humungeous burden. The > "holes" > > > in a violin bridge are there to "filter" the sound. Downbearing on a > fiddle > > > is almost as much as that on a piano. > > > > > I'm assuming you are refering to the 'downbearing' on just the bass bridge. > While it is true that the string bearing on many bass bridges is not much > higher than this, the soundboard is affected by the string bearing on the > tenor bridge as well. It is the complete, integrated system we have to > consider. > > Generally, holes are put in bass bridges to reduce their mass. That these > holes are ineffective goes to the basic principles of soundboard impedance. > This impedance is not linear across the frequency spectrum. In other words, > it is frequency dependent. It is primarily mass-controlled at high > frequencies and primarily spring-controlled at low frequencies. Drilling a > few holes in the body of a bass bridge generally will not affect mass enough > to make an audible change in the tone quality of the typical piano. > > Del > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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