The present disclosure relates to a keypad structure for woodwind instrument tone holes, and more particularly, to a keypad structure for woodwind tones which improves the adhesion of a keypad connected to a tone hole tube in which the tone hole is formed in the woodwind instrument, prevents the sound from being exposed to the outside through the tone hole tube and the pad, and can generate excellent resonance so that the resonance of a desired sound can be constantly generated through the closed keypad.

One embodiment of the present application sets forth a method for simulating an audio output of a three-dimensional object that includes a resonant cavity. The method includes receiving an input mesh of a three-dimensional shape and a hole configuration. The input mesh has an outer surface and an internal cavity, and the hole configuration includes one or more holes. The method further includes adding the one or more holes to the three-dimensional shape based on the hole configuration to generate a modified three-dimensional shape having a resonant cavity. The resonant cavity includes the one or more holes and the internal cavity. The method further includes determining an air pressure coefficient matrix for the resonant cavity. The method further includes computing a minimum non-zero eigenvalue for the air pressure coefficient matrix. The method further includes determining an output resonant frequency for the resonant cavity based on the minimum non-zero eigenvalue.

One embodiment of the present application sets forth a method for simulating an audio output of a three-dimensional object that includes a resonant cavity. The method includes receiving an input mesh of a three-dimensional shape and a hole configuration. The input mesh has an outer surface and an internal cavity, and the hole configuration includes one or more holes. The method further includes adding the one or more holes to the three-dimensional shape based on the hole configuration to generate a modified three-dimensional shape having a resonant cavity. The resonant cavity includes the one or more holes and the internal cavity. The method further includes determining an air pressure coefficient matrix for the resonant cavity. The method further includes computing a minimum non-zero eigenvalue for the air pressure coefficient matrix. The method further includes determining an output resonant frequency for the resonant cavity based on the minimum non-zero eigenvalue.

The present disclosure relates to a keypad structure for woodwind instrument tone holes, and more particularly, to a keypad structure for woodwind tones which improves the adhesion of a keypad connected to a tone hole tube in which the tone hole is formed in the woodwind instrument, prevents the sound from being exposed to the outside through the tone hole tube and the pad, and can generate excellent resonance so that the resonance of a desired sound can be constantly generated through the closed keypad.

The present disclosure relates to a keypad structure for woodwind instrument tone holes, and more particularly, to a keypad structure for woodwind tones which improves the adhesion of a keypad connected to a tone hole tube in which the tone hole is formed in the woodwind instrument, prevents the sound from being exposed to the outside through the tone hole tube and the pad, and can generate excellent resonance so that the resonance of a desired sound can be constantly generated through the closed keypad.

In an embodiment a flute head joint includes a beak-shaped mouthpiece and a curved neck, wherein the mouthpiece comprises a curved labium, and wherein a chamber of the mouthpiece has a larger diameter than an inner cavity of the neck.

In an embodiment a flute head joint includes a beak-shaped mouthpiece and a curved neck, wherein the mouthpiece comprises a curved labium, and wherein a chamber of the mouthpiece has a larger diameter than an inner cavity of the neck.

An apparatus and method for its use employ a magnet assembly to securely hold a knife by its blade. Along with a carriage and angle adjustment assembly that set and control the sharpening angle of the knife relative to a sharpening surface, the apparatus provides for sharpening of knives such as double hollow ground reed scraping knives, and bevel reed scraping knives.

A brass instrument includes a mouthpiece configured to convert vibrations of player's lips into sound and take the sound inside; a bell configured to magnify a volume of the sound taken by the mouthpiece and release the sound to the outside; and a main tube intervening between the mouthpiece and the bell, and is characterized in that the main tube includes a main tube body formed to spread out in a spiral manner in a state in which side surfaces of the main tube body are closely attached to each other, and a part of the closely attached side surfaces of one of the tubes constitutes a part of the side surface of the closely attached other tube.

A brass instrument includes a mouthpiece configured to convert vibrations of player's lips into sound and take the sound inside; a bell configured to magnify a volume of the sound taken by the mouthpiece and release the sound to the outside; and a main tube intervening between the mouthpiece and the bell, and is characterized in that the main tube includes a main tube body formed to spread out in a spiral manner in a state in which side surfaces of the main tube body are closely attached to each other, and a part of the closely attached side surfaces of one of the tubes constitutes a part of the side surface of the closely attached other tube.