Patent ID: 7508115
Filing Date: 2009-03-24
Classification: B06B

Abstract:
1. A horn to which oscillations are applied by an oscillator, comprising: a portion in which a cross section perpendicular to a lengthwise direction of said horn has: wherein a sectional area of the first region has a maximum displacement in the first direction and a sectional area of the second region has a minimum displacement in the first direction at a first position of the horn, the first position corresponding to an anti-node of a standing wave of oscillations excited in the horn, and wherein a transition of the sectional area of the first region decreases in the first direction from the first position to a second position along the lengthwise direction, and a transition of the sectional area of the second region in the first direction increases from the first position to the second position along the lengthwise direction, the second position corresponding to a node of the standing wave.