[pianotech] What's causing this vibration?

[Bruce Browning]

Bass string too close to damper wire!


On 10 March 2012 10:59, Rebecca and John Silva <misc at rjsilva.com> wrote:

> Hi,
>
> When playing a particular note on a piano I saw today (Baldwin L) a harsh
> vibration would sound. The vibration would only happen for a moment (1/4
> second?) even while the note continued to sound, it was about 1/2 the
> volume of the note and only happened when playing hard. I worked with the
> owner for about an hour trying to figure it out and we were only able to
> determine it is based on pitch—if I detuned the note it would go away, and
> if I detuned the adjacent note 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 loose, tapped on the bridge pins, and tried to figure out where the
> vibration was coming from.
>
> Does anyone have any suggestions of where to look? Any common but elusive
> offenders? Two highly regarded technicians in the area were also apparently
> unable to figure it out.
>
> Thanks!
>
> John




-- 
Bruce Browning
The Piano Tuner
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