US 4,308,932 A · Loudspeaker horn

Abstract

A loudspeaker horn having improving directivity has a pair of smoothly flared vertical sidewalls joined to a pair of smoothly flared horizontal sidewalls. In an exemplary embodiment, one pair of sidewalls is generated as a surface of revolution, with the curvature of the surface being defined by a power series formula. The contour of the remaining pair of sidewalls is also defined by the power series formula, although different constants may be used. The vertical and horizontal sidewalls are separately defined and are substantially congruent at the rectangular or square mouth. In the exemplary embodiment, the gap formed at the back of one of the pairs of sidewalls is connected to the throat formed at the back of the other pair of sidewalls by a connecting section having an arcuate area which monotonically increases from the throat to the gap.

Claims14

Dependent claims

A loudspeaker horn comprising

a first pair of sidewalls having a contour defined by an equation having a constant term, a linear term and an exponential term, each of said terms including a non-zero constant,
a second pair of sidewalls disposed substantially ninety degrees to said first pair of sidewalls and having a contour defined by an equation of the same form as the equation defining the first pair of sidewalls, said first and second pairs of sidewalls being substantially congruent at one end to form a mouth, and said second pair of sidewalls forming a gap at the remaining end thereof, and
a connecting section connecting the gap formed by the second pair of sidewalls to the remaining end of the first pair of sidewalls to form a throat, said throat being adapted to be connected to a driver, said first pair of sidewalls being smoothly joined to said second pair of sidewalls and said connecting section.

Dependencies are inferred from the claim text.

Loudspeaker horn

Life of this patent

Loudspeaker horn

Life of this patent

Abstract

Claims14