Construction and mode of action of the conical string instruments

 

1. Due to the complete sound funnel formation of the ribs with the back plate, the vibrations of air molecules with the resonant body are much more focused on the sound-projecting top plate.

2. The ribs, which slant toward the base inwardly – in contrast to vertically-mounted ribs – are actively involved in the resonance and thus increase the acoustic vibration potential and, in turn, the volume of sound.

3. The strength of the hard back plates made of heavy maple or other hardwoods – in proportion to the spruce top plates – can be made thinner, thanks to the conically formed ribs, because of their reduction in size with the same stability.

4. The resulting size and mass reduction of the resonating sound-box of the stringed instruments and especially due to the sound-funnel resulting from the conical ribs and back plate, the instrument becomes suppler and more resonant with lower damping.

5. Finally, as the result of the sound funnel form, a natural megaphone effect is produced toward the sound-resonating top plate, resulting in a significant increase in the loudness in sound volume, focus and projection of the sound of a stringed instrument designed and built in this manner.

 

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