[pianotech] What's causing this vibration?

[John Ross]

Electric element in a baseboard heater.
John Ross
Windsor, Nova Scotia
On 10-03-2012, at 10:57 PM, <atrav27 at att.net> wrote:

> 
> ----- Original Message ----- From: Larry Fisher RPT 
> glass in picture frame on wall
> tin insert in deco item on the wall
> filament in a lamp
> =================
> 
> Coins in a piggy bank or a change dish can make a real hissing tin foil sound.
> 
> -Aron-

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