Abstract
In a mouthpiece of flute, a projective tongue piece is formed in a position where the inner surface of a hole on the side on which a lip is to be put meets the inner surface of a head pipe so as to form a bulgy rounded concaved surface which is made to bulge outwardly of the head pipe, so that the interior space of the pipe is divided by the projective tongue piece into two pats including an acoustic space and a fluid space. In order to make is possible to give a clear, vigorous, rich and loud sound easily as well as to give high-pitched tones without difficulty, the inner surface of the head pipe in the vicinity of the hole comprises a rounded raised portion which is so formed as to draw a smooth streamline for serving as the inner surface of the pipe and has a cross-sectional area equal to that of a space defined by the bulgy rounded concaved surface, and air screening dikes which are formed on both sides of the rounded raised portion, respectively.
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