[pianotech] What's causing this vibration?

[tnrwim at aol.com]

Sympathetic vibration with something else in the room? 

This is what I was going to suggest. Get away from the piano, and start walking around the room while someone else plays the piano. It might sound like it's coming from the piano, but these kinds of sounds can be very misleading. 

Wim


 



-----Original Message-----
From: Laura Olsen <ajoyfulsound at gmail.com>
To: pianotech <pianotech at ptg.org>
Sent: Fri, Mar 9, 2012 5:19 pm
Subject: Re: [pianotech] What's causing this vibration?


Damper wire?  Sympathetic vibration with something else in the room?  Something 
n the soundboard?
Laura
n Mar 9, 2012, at 5:59 PM, Rebecca and John Silva wrote:
> Hi,
 
 When playing a particular note on a piano I saw today (Baldwin L) a harsh 
ibration would sound. The vibration would only happen for a moment (1/4 
econd?) even while the note continued to sound, it was about 1/2 the volume of 
he note and only happened when playing hard. I worked with the owner for about 
n hour trying to figure it out and we were only able to determine it is based 
n pitch—if I detuned the note it would go away, and if I detuned the adjacent 
ote to the offending pitch that new note would cause the vibration. 
 
 I looked at everything I could, ensured every part/screw I could see was not 
oose, tapped on the bridge pins, and tried to figure out where the vibration 
as coming from.
 
 Does anyone have any suggestions of where to look? Any common but elusive 
ffenders? Two highly regarded technicians in the area were also apparently 
nable to figure it out.
 
 Thanks!
 
 John

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