Sympathetic Vibration

[Willem Blees]

Arile

Customers have a tendency to only believe what they want to believe, no matter what you tell them. Vibrations can be very difficult to trace. Humidity and? temperature will cause vibrations to come and go. Just moving the piano an inch on the floor is all it takes to get rid of a vibration. Even though the customer is convinced the vibration was there before the wall hanging was put up, the only thing you can do is ask the customer to call you the minute she hears the vibration again, because you can't fix the "vibration" if you can't hear it. 


Willem (Wim) Blees, RPT
Piano Tuner/Technician
Honolulu, HI
Author of 
The Business of Piano Tuning
available from Potter Press
www.pianotuning.com


-----Original Message-----
From: Arlie Rauch <adarpub at midrivers.com>
To: pianotech at ptg.org
Sent: Tue, 20 Nov 2007 7:34 am
Subject: Sympathetic Vibration


I tuned for a customer yesterday who complained of a sympathetic vibration. The piano is a nice Yamaha studio, just a few years old. The mother of the house was not home, but her daughter who takes lessons was. When I struck the C below middle C, she said, There's the vibration. The sound was being made by a wallhanging, which, incidentally was a curvy metal musical staff with a couple notes on it. Damping that solved the problem.?
?
This morning the customer called certain that the vibration had been there before the wallhanging had (not that she was still hearing it). Only problem is that that was the only vibration we heard, it was identified by the pupil, and damping it eliminated the problem.?
?
The customer thinks it's in the piano. Just wondering whether any of you have noticed strange vibrations associated with Yamaha pianos. I've tuned quite a few, and I've never noticed anything strange typical of that brand and especially difficult to trace.?
?
Arlie Rauch?


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