FIELD: physics.
SUBSTANCE: sound-forming reed device for a musical instrument has a housing with a input and output chambers; between said chambers, a voice bar with a reed, attached on the side of the input chamber; first and second outer openings in the housing for linking its cavity with a high/low pressure air source, for example a fur chamber or atmosphere; values for controlling direction of air flow between the fur chamber, the input and output chambers and the atmosphere. The housing of the sound-forming device is provided with four inner openings. The first opening links the input chamber with the first outer opening, the second - with the second outer opening, the third - with the second outer opening and the fourth - with the first outer opening. Said inner openings are equipped with check valves such that when the air stream enters the first outer opening, it is directed through the first inner opening into the input chamber and, after passing the opening of the voice bar through the output chamber and third inner opening, it is directed into the second outer opening. When the air stream enters the second outer opening, it is directed through the second inner opening into the input chamber and, after passing the opening of the voice bar, through the output chamber and the fourth inner opening, it is directed into the first outer opening. The reed musical instrument has a half-body with keyboard-valve mechanisms, fur, a fur chamber, decks with openings and said sound-forming reed devices. Each of the decks is in form of a board adjoining on the side of the input chamber housings of the sound-forming devices of the half-body of the instrument and serving as a common cover therefor. The board has openings, each closed by a removable airtight cover, dimensions of which are defined by the possibility of servicing and replacing voice bars of the sound-forming device lying under said cover.
EFFECT: high repairability and improved sound quality of the musical instrument.
3 cl, 18 dwg
