[pianotech] Tuning the duplex sections

[Mark Schecter]

Hi David, 

I think that this results from the sound in the air exciting movement in the soundboard, which causes movement of the strings through the bridge. From that point on, the sustain is as usual. You can model this by connecting a loudspeaker to an amplifier's input, and make a sound. The sound is transduced into an electrical signal by the speaker funtioning in reverse. Likewise the soundboard. 

-- Mark Schecter



On Mar 14, 2011, at 7:05 PM, "David Love" <davidlovepianos at comcast.net> wrote:

> Why would that be a surprise?  If you go to the piano, lift the dampers and
> then simply clap your hands over the strings you'll get some excitement of
> the strings.  That certainly comes from the change in air pressure that
> follows the clapping of your hands.