Multi-dimensional transducer array and method with air separation

A multi-dimensional transducer array comprising:

• a first element;
• a second element adjacent the first element and elevationally spaced along an elevation dimension from the first element;
• and
• first and second electrodes on the first element and third and fourth electrodes on the second element, wherein electrical contact between the first and second electrodes comprises asperity contact and electrical contact between the third and fourth electrodes comprises asperity contact;
• wherein each element has at least two layers of piezoelectric material, the first and second elements are separated by a gas and the at least two layers of each element are stacked in a range dimension, the range dimension different than the elevation dimension, the first and second electrodes being stacked with the at least two layers of the first element and the third and fourth elects being stacked with the at least two layers of the second element.