Modifying the operational center frequency of an array

摘要

The present invention modifies an operational center frequency of a transducer array. The array of transducer elements has uniform on-center spacing between adjacent members of the elements having adjacent edges. A controller activates one of a plurality of subsets of the elements that is defined by a pattern throughout the array of activated members of the elements and non-activated members of the elements. The particular pattern in a beamforming direction defines a unique operational center frequency for the array.