Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > August 1996 > 1996.08.29 > 03Prev  Next


Nodal Ringing
By John A. Tuttle

Hi all,

For the past few years I have been modifying the dampers on upright pianos in an effort to reduce nodal ringing in the low tenor region (tri-chords).

The methodology is the same one utilized in grand pianos. Simply split the damper into two pieces. I have had 100% success with this procedure and so I thought I should pass the information around. As a precursor, I always square the damper head to the strings as best as reasonably possible. (I don't use a micrometer.) For the really troublesome notes nearest the break, I do use tri-chord dampers but I also cut a "V" out of the center so that there are two definite points of contact.

The attached bit map is for example only.

Musically, John Tuttle

[ Ed. Note: John, thanks for the drawing "DAMPER.BMP". I'll save it
[ for placement in the archive when Jody returns. -- Robbie


(Message sent Thu 29 Aug 1996, 15:22:57 GMT, from time zone GMT-0400.)

Key Words in Subject:  Nodal, Ringing

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2024 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Please Support Publication of the MMD with your Generous Donation

Pay via PayPal

No PayPal account required

                                     
Translate This Page