PURPOSE: To easily provide the resonance of sounds and the pronunciation of high/low-pitched sounds with a high sound volume and simplify the fitting and use of this apparatus by constituting it with two pieces and a slender object. ;CONSTITUTION: This mouthpiece is inserted into the mouth so that a piece 1 is pinched by the left molar teeth and a piece 2 is pinched by the right molar teeth, and a bridge 3 is suspended along the front teeth or gums on the outside of the front teeth or gums of the upper jaw. The pieces 1, 2 pinched by the molar teeth are normally set to about 8-12mm in height, 10-20mm in horizontal width, and about 10mm in vertical width to lower the lower jaw and widen the mouth so that the movement of the tongue and the transit of voice are not hindered. Since the bridge portion 3 can be fitted along the outside of the front teeth or gums of the upper jaw, the upper jaw is not moved vertically when the mouth is moved, the mouthpiece is fixed, and the movement of the tongue is not hindered.;COPYRIGHT: (C)1995,JPO
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