Sound diffuser accessory, suitable to be associated to a sound source, such as an electric or electronic or digital musical device or instrument and suitable to diffuse sounds or sound signals deriving from said sound source, wherein such accessory includes at least one sound board, and support structure for the sound board, wherein the sound board includes a board or panel having a flat or slightly curved shape and including a first exposed surface, a second surface, opposite to the first surface and a thickness (S), wherein the sound board includes or is connected with at least one transducer of the electromechanical and/or piezoelectric and/or piezoceramic and/or magnetodynamic and/or magnetostrictive type and wherein the support structure includes at least one element having a substantially strip-like shape and spacer means having a height (H2), suitable to constrain and space the at least one sound board and the support structure.

Sound diffuser accessory, suitable to be associated to a sound source, such as an electric or electronic or digital musical device or instrument and suitable to diffuse sounds or sound signals deriving from said sound source, wherein such accessory includes at least one sound board, and support structure for the sound board, wherein the sound board includes a board or panel having a flat or slightly curved shape and including a first exposed surface, a second surface, opposite to the first surface and a thickness (S), wherein the sound board includes or is connected with at least one transducer of the electromechanical and/or piezoelectric and/or piezoceramic and/or magnetodynamic and/or magnetostrictive type and wherein the support structure includes at least one element having a substantially strip-like shape and spacer means having a height (H2), suitable to constrain and space the at least one sound board and the support structure.

An upright piano includes an internal space enclosed by a case including an upper front board disposed above a key bed and a lower front board disposed below the key bed, and a resonance tube in which a hollow region having an opening is formed and that is disposed in the internal space, in which the opening is disposed at the left end of the lower end of the upper front board or the upper end of the lower front board, or at the right end of the lower end of the upper front board or the upper end of the lower front board.

An upright piano includes an internal space enclosed by a case including an upper front board disposed above a key bed and a lower front board disposed below the key bed, and a resonance tube in which a hollow region having an opening is formed and that is disposed in the internal space, in which the opening is disposed at the left end of the lower end of the upper front board or the upper end of the lower front board, or at the right end of the lower end of the upper front board or the upper end of the lower front board.

The board for a musical instrument according to the present disclosure includes: a first base layer; and a pair of first reinforcement layers laminated on both face sides of the first base layer, in which the first reinforcement layers includes a fiber and a binder, and the fiber is a polyparaphenylenebenzobisoxazole fiber, a liquid crystal polyester fiber, an aramid fiber, a polyarylate fiber, an ultra high-molecular weight polyethylene fiber, a polyethylene naphthalate fiber or a glass fiber.

An insulator is implemented such that a lower structure member to be brought into contact with a floor surface allows an upper structure member on which a piano is placed to be suspended through a cantilever spring member and a first wire, and a second wire connects the upper structure member and the lower structure member to each other in the horizontal direction, and the insulator thus functions so as to maintain intrinsic sound generated by the piano by free vibration in pendulum motion using the upper end of the first wire as a pivot, and richness of the sound is enhanced and transmission to a floor surface is inhibited, and, further, vibration caused by a key and a pedal being operated by a performer is reduced by elasticity of the cantilever spring member and the tensile force that acts on any of the second wires, and the performer does not feel uncomfortable with the operation.

An insulator is implemented such that a lower structure member to be brought into contact with a floor surface allows an upper structure member on which a piano is placed to be suspended through a cantilever spring member and a first wire, and a second wire connects the upper structure member and the lower structure member to each other in the horizontal direction, and the insulator thus functions so as to maintain intrinsic sound generated by the piano by free vibration in pendulum motion using the upper end of the first wire as a pivot, and richness of the sound is enhanced and transmission to a floor surface is inhibited, and, further, vibration caused by a key and a pedal being operated by a performer is reduced by elasticity of the cantilever spring member and the tensile force that acts on any of the second wires, and the performer does not feel uncomfortable with the operation.

An upright piano includes an internal space enclosed by a case including an upper front board disposed above a key bed and a lower front board disposed below the key bed, and a resonance tube in which a hollow region having an opening is formed and that is disposed in the internal space, in which the opening is disposed at the left end of the lower end of the upper front board or the upper end of the lower front board, or at the right end of the lower end of the upper front board or the upper end of the lower front board.

An upright piano includes an internal space enclosed by a case including an upper front board disposed above a key bed and a lower front board disposed below the key bed, and a resonance tube in which a hollow region having an opening is formed and that is disposed in the internal space, in which the opening is disposed at the left end of the lower end of the upper front board or the upper end of the lower front board, or at the right end of the lower end of the upper front board or the upper end of the lower front board.

An insulator is implemented such that a lower structure member to be brought into contact with a floor surface allows an upper structure member on which a piano is placed to be suspended through a cantilever spring member and a first wire, and a second wire connects the upper structure member and the lower structure member to each other in the horizontal direction, and the insulator thus functions so as to maintain intrinsic sound generated by the piano by free vibration in pendulum motion using the upper end of the first wire as a pivot, and richness of the sound is enhanced and transmission to a floor surface is inhibited, and, further, vibration caused by a key and a pedal being operated by a performer is reduced by elasticity of the cantilever spring member and the tensile force that acts on any of the second wires, and the performer does not feel uncomfortable with the operation.