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Do String Beans generate sound?

In physics, the vibrational energy is proportional to the mass.  The String Bean™ products, being ultra-lightweight, do not generate additional noise but honestly reflect the string quality.  Namely, if strings are in bad condition and needed to be renewed, the noise due to the string decay could be more audible.  As a reminder for string renewal, they help users maintain their instruments in the best condition. 
Does my instrument revert to its previous tone, after String Beans are removed?

Yes. Upon removal of the String Bean™, a difference in sound quality can be immediately observed, similar to changing instrument hardware. However, due to the elasticity of the wooden fibers, the instrument may initially sound loud  (the memory effect) but not as tonally-enriched as it was with the String Bean™. The plain sound quality will eventually be restored within a few weeks.
Can strings using a fine tuner have String Bean™?

 Yes. The String Bean™ technology is compatible with many cellos and some violins and violas that feature double prong tailpiece tuners, either built-in or as a separate installation. However, it is not compatible with single prong fine tuners commonly used on the e-string of violins and the a-string of violas. Nevertheless, even with a single bean installed, the sound quality of the other strings will still change, including those with fine tuners. The optimal results can be achieved by experimenting with different combinations of beans installed, typically 3 or 4 beans on the majority of instruments.