I would suppose that more rigid bars to have lower resident frequency. Leonard
On 11/23/14, 10:37 AM, "Martin Shepherd" <mar...@luteshop.co.uk> wrote: >I fear there is a natural tendency to think of the rose as the hole that >"lets the sound out", but I think this is a case where intuitive physics >lets us down. The size of the opening affects the natural resonant >frequency of the body, with a smaller opening giving a lower frequency. > >But I invite all you proper physicists out there to explain why! > >A more complex issue, but one which is related in that it also involves >a mismatch between intuitive physics and the real thing: many people >seem to believe that the lute soundboard should be flexible to "allow it >to vibrate", and that the more flexible it is the better the bass >response. In fact I think - please contradict me if I'm wrong - that >the frequencies which we are interested in are far too high to be aided >by a floppy soundboard, which is more likely to have a damping effect. >As far as I can see, a relatively rigid soundboard is going to produce a >more sustained sound. The most important factor is the mass, which must >be kept as small as possible so it can be activated by a small input of >energy - hence the rather thin soundboards (supported by many bars to >retain sufficient rigidity) required by lutes. > >Martin >On 23/11/2014 16:07, BENJAMIN NARVEY wrote: >> Dear All, >> Just wondering if any of you (especially the makers out there) have >> thoughts about the projection of single versus triple roses. >> I have had many lutes/theorboes with both single and triple roses >>over >> the years, and I have always felt that triple roses helped make more >> sound, and that single roses made possibly more focussed, but more >> "woody", interior, sounds. Perhaps I am wrong?A >> All thoughts welcome. >> All best, >> And thanks, >> Benjamin >> >> -- >> >> [1]www.luthiste.com >> t +33 (0) 6 71 79 98 98 >> >> -- >> >> References >> >> 1. http://www.luthiste.com/ >> >> >> To get on or off this list see list information at >> http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html > > >--- >This email has been checked for viruses by Avast antivirus software. >http://www.avast.com > >
