Patent ID: 7510049

Claim:
An acoustic transformer, comprising: outer walls defining an outer envelope; at least one dividing wall being disposed centrally of the outer walls and extending from one side of the outer envelope to another side of the outer envelope, said at least one dividing wall dividing the outer envelope into two parts defining, along with said outer walls, two waveguides of substantially identical shape, each of said two waveguides including a generally circular entrance at a first end and a generally rectangular exit at a second end and having a cross sectional shape which is initially generally semicircular proximate to the entrance and which then changes over into a generally rectangular shape proximate to the exit, said dividing wall extending from the entrance to the exit; and sound waves displacement structures, each presenting a convexly curved surface, extending into each of the two waveguides from said at least one dividing wall, each of the outer walls of the waveguides being disposed approximately parallel to the surface of a corresponding one of the displacement structures, respective ends of the waveguides running out at an acute angle toward one another.