Acoustic wave device, filter, multiplexer, radio-frequency front-end circuit, and communication device

An acoustic wave device comprising:

• a high acoustic velocity material layer;
• a piezoelectric body directly or indirectly provided on the high acoustic velocity material layer;
• and
• an interdigital transducer electrode directly or indirectly provided on the piezoelectric body;
• wherein
• an acoustic velocity of bulk waves that propagate in the high acoustic velocity material layer is higher than an acoustic velocity of acoustic waves that propagate in the piezoelectric body;
• the interdigital transducer electrode includes a first busbar, a second busbar spaced away from the first busbar, a plurality of first electrode fingers electrically connected to the first busbar, and a plurality of second electrode fingers electrically connected to the second busbar;
• and
• a weighting is applied to the interdigital transducer electrode by providing a floating electrode finger not electrically connected to the first busbar or the second busbar or applied by providing an electrode finger provided by metallizing a gap between the first electrode fingers or a gap between the second electrode fingers to integrate the first electrode fingers or the second electrode fingers.