Balanced Harp: principles of work

A conventional harp is formed by strings that are from the top of the structure (tuning machines) to the soundboard.
Each string, to be tuned at the pitch of the note it has to produce, it's set to mechanical tension.
This tension is applied to the sounboard as well.
But 30-40 strings, apply a huge tension to the sounboard, stressing it continuously and for that reason, they are limiting it in the machanical excursion during the vibration (elongation) and dumping the sustain of the harp.
The strings' tension deforms the soundboard as well, creating quite huge "mechanical moments" on its surface that often lead to its brak-off. The first picture shows this work manner.

The obvious solution to all these issues that are affecting a conventional harp, is to reduce the mechanical stress of the soundboard.
The main question is: how to do that.

The solution we invented and applied, solves all issues.
Inside the resonator, there are other stings called: counter-strings that are tracking the soundboard to the opposite side than the main strings.
This impacts the stress of the sounboard, compensating it and deleting it.
The soundboard is thus "floating" and its elongation is bigger as well as the sustain of the whole instrument.
This system is called: Balanced Harp (Arpa Bilanciata in my native language: italian)
In the second picture is shown the principle of the Balanced Harp, in order to clear out any doubt.
In this way the solicitation that in a conventional harp are literally destroing the sound and the soundboard as well, with the Balanced Harp they are totally deleted! And the issue is solved.
The sound is alive, and the mechanical duration of the soundboard is enourmously extended.
Even the harmonic content of each note is enourmously increased.
Measures made in laboratory, are clearly and univocally show this great instrument.

Here below some comparative diagram. Clicking on the pictures, it will be opened another window with bigger images.