Abstract: A device for improving the sound quality of an acoustic musical instrument made of wood provided with a plurality of metallic strings comprises a hollow casing adapted to be placed above the strings of the instrument, a generation circuit housed in the hollow casing for generating an electromagnetic field, a plurality of emitting elements hosed in the hollow casing and connected to the generation circuit to direct the electromagnetic field toward the strings of the instrument, wherein the hollow casing is provided with coupling elements to be mounted on the instrument at a predetermined distance from the strings such as to maintain the emitting elements raised from the strings to induce, without contact, independent vibration thereof by means of the electromagnetic field.

Abstract: A device for improving the sound quality of an acoustic musical instrument made of wood provided with a plurality of metallic strings comprises a hollow casing adapted to be placed above the strings of the instrument, a generation circuit housed in the hollow casing for generating an electromagnetic field, a plurality of emitting elements hosed in the hollow casing and connected to the generation circuit to direct the electromagnetic field toward the strings of the instrument, wherein the hollow casing is provided with coupling elements to be mounted on the instrument at a predetermined distance from the strings such as to maintain the emitting elements raised from the strings to induce, without contact, independent vibration thereof by means of the electromagnetic field.

Abstract: A percussion musical instrument comprises an hollow sound box defining a central longitudinal axis with an open upper end portion having a first annular edge, a membrane defining a striking surface fastened to the first annular edge for closing the same, anchoring means for the stretched anchoring of the membrane to the upper end portion of the sound box comprising watertight means adapted to avoid liquid leakage through the first annular edge for allowing the instrument to be used also with the membrane in upside down position and with liquid inside the sound box and into contact with the membrane.

Abstract: A percussion musical instrument comprises an hollow sound box defining a central longitudinal axis with an open upper end portion having a first annular edge, a membrane defining a striking surface fastened to the first annular edge for closing the same, anchoring means for the stretched anchoring of the membrane to the upper end portion of the sound box comprising watertight means adapted to avoid liquid leakage through the first annular edge for allowing the instrument to be used also with the membrane in upside down position and with liquid inside the sound box and into contact with the membrane.