An audio output device, comprising: a first electrode layer including electrodes arranged in a plurality of columns in a first direction; a second electrode layer provided to a backside of the first electrode layer, the second electrode layer including electrodes arranged in a plurality of columns in a second direction; a drive layer including a piezoelectric layer provided between the first electrode layer and the second electrode layer and a support layer coupled to either a front side or a backside of the piezoelectric layer; a support plate coupled to a backside of the drive layer, the support plate having a hollow portion formed in an area corresponding to points at which the electrodes in the plurality of the columns of the first electrode layer and the electrodes in the plurality of the columns of the second electrode layer intersect with each other, respectively; a flexible PCB providing voltage to the first electrode layer and the second electrode layer; a plurality of perforated holes formed in the piezoelectric layer; and a plurality of auxiliary connection wires provided across the front side of the piezoelectric layer by passing through the perforated holes; wherein the auxiliary connection wires are connected to each of the plurality of the column electrodes of the second electrode layer on the backside of the piezoelectric layer; wherein the flexible PCB comprises: a first circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the first electrode layer by being connected to the electrodes in the plurality of the columns of the first electrode layer; and a second circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the second electrode layer by being connected to the electrodes in the plurality of the columns of the second electrode layer; wherein the second circuit unit is connected to the auxiliary connection wires; and wherein the first circuit unit and the second circuit unit are provided to the front side of the piezoelectric layer. a first electrode layer including electrodes arranged in a plurality of columns in a first direction; a second electrode layer provided to a backside of the first electrode layer, the second electrode layer including electrodes arranged in a plurality of columns in a second direction; a drive layer including a piezoelectric layer provided between the first electrode layer and the second electrode layer and a support layer coupled to either a front side or a backside of the piezoelectric layer; a support plate coupled to a backside of the drive layer, the support plate having a hollow portion formed in an area corresponding to points at which the electrodes in the plurality of the columns of the first electrode layer and the electrodes in the plurality of the columns of the second electrode layer intersect with each other, respectively; a flexible PCB providing voltage to the first electrode layer and the second electrode layer; a plurality of perforated holes formed in the piezoelectric layer; and a plurality of auxiliary connection wires provided across the front side of the piezoelectric layer by passing through the perforated holes; wherein the auxiliary connection wires are connected to each of the plurality of the column electrodes of the second electrode layer on the backside of the piezoelectric layer; wherein the flexible PCB comprises: a first circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the first electrode layer by being connected to the electrodes in the plurality of the columns of the first electrode layer; and a second circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the second electrode layer by being connected to the electrodes in the plurality of the columns of the second electrode layer; wherein the second circuit unit is connected to the auxiliary connection wires; and wherein the first circuit unit and the second circuit unit are provided to the front side of the piezoelectric layer. a first circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the first electrode layer by being connected to the electrodes in the plurality of the columns of the first electrode layer; and a second circuit unit selectively applying the voltage to each of the electrodes in the plurality of the columns of the second electrode layer by being connected to the electrodes in the plurality of the columns of the second electrode layer; wherein the second circuit unit is connected to the auxiliary connection wires; and wherein the first circuit unit and the second circuit unit are provided to the front side of the piezoelectric layer.