hosted on condor3913
 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 > October 2002 > 2002.10.02 > 11Prev  Next

Turbine Blower Noise
By John A. Tuttle

Hi All,  This is just a heads-up message.  It's a proven fact that the
amount of noise produced by a vacuum motor is directly related to the
amount of air being moved.  Ergo, if your instrument/mechanism is
relatively air-tight, less air will flow across the turbines in the
motor and there will be less noise.  If you don't believe me, cap off
the motor with your hand and then remove your hand.  You'll get the

To improve the sound-to-noise (music verses pump noise) ratio even
further, the vacuum pumps I sell have a voltage controller that varies
the speed of the pump in both the play and rewind cycles (two needs:
two settings).

Look at it this way; If you have a unit that has a leakage factor of
20%, and you generate just enough vacuum to overcome the leakage, much
less air will flow across the turbine blades than if the pump is
running at 100% and the excess vacuum is bled off to the outside
atmosphere.  Truly, vacuum pumps used in leaky player pianos represent
a case where "more is not better".


John A. Tuttle
Brick, NJ, USA

(Message sent Wed 2 Oct 2002, 15:33:31 GMT, from time zone GMT-0400.)

Key Words in Subject:  Blower, Noise, Turbine

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 1995-2023 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

Pay via PayPal

No PayPal account required

Translate This Page