There won't be any 'funny bounces'. You get those effects with short waves in a large cavity. Here the wavelength, up to 1m, is much longer than the size of the hole, a few mm. The main contribution for a small hole is proportional to the volume of the hole. The shape is irrelevant, pretty much.
John -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Julia Say Sent: 10 February 2011 13:44 To: Dartmouth NPS Subject: [NSP] Re: Tuning/pitch > From: Francis Wood Sent: 10 February 2011 11:55 > Personally, I'd avoid leaving those marks. As would we all, I think. > But I'm grateful to those early makers > who did, because it leaves unequivocal evidence of the intended position of > those > tone-holes, no matter how much they have been altered. No, surely it just marks the point at which the drill "landed", which might not have been at rightangles to the bore in the first place. I could foresee a situation in which the point of the drill (particularly if a pilot hole is drilled through first using - say - a 2mm drill - could be a couple of mm out from where the centre of the hole actually ends up. And that could make quite a difference. Also I'm not convinced by the "the tone holes are much bigger" argument. If we have waves bouncing about in there, a small depression could surely catch a sound wave at a funny angle and cause it to behave in a less than theoretically perfect manner - I' m thinking of the sort of "dodgy bounces" that any tennis player or cricketer might encounter occasionally (to put in terms I can follow!) Have you ever watched a high sea bouncing off a promenade? All sorts of crazy cross waves happen, and often not repeatably. Once there's a "loose wave" in there doing unpredictable things, even if only a tiny proportion of the moving air, I'm sure the resultant maths could get one whole lot more hairy. And the resultant sound less pleasing in some way. (I did spend 10 years operating a machine that made atomic nuclei wobble and recording the results, so I am aware that there are all sorts of micro- possibilities - even if I can't describe the effects in acceptably scientific terms). Julia To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
