Patent ID: 8781136

Claim:
A method for varying directivity of a two-dimensional loudspeaker array comprising: determining optimal locations for a linear plurality of transducers along a main axis, the plurality of transducers positioned in pairs symmetrically about a center point of the main axis at locations optimized according to transducer size, number of transducers, and a directivity target function; replacing one of a selected symmetrical pair of the linear plurality of transducers with a first pair of replacement transducers substantially identical to the selected symmetrical pair of transducers; replacing the other one of the selected symmetrical pair with a second pair of replacement transducers substantially identical to the selected symmetrical pair of transducers; positioning the first replacement transducer pair symmetrically about the location of one of the replaced pair of transducers on the main axis, the first replacement transducer pair located along a line parallel to a second axis perpendicular to the main axis; and positioning the second replacement transducer pair symmetrically about the location of the other one of the replaced transducer on the main axis, the second replacement transducer pair located along a line parallel to the second axis; where the second replacement transducer pair is positioned to be symmetrical to the first replacement transducer pair about the second axis.