Abstract: In order to solve problems with an audio device that is difficult to machine and has an increased amount of wiring, the present invention provides an audio output device comprising: a first electrode layer including a plurality of rows of electrodes arranged in a first direction; a second electrode layer disposed on the back surface of the first electrode layer and including a plurality of rows of electrodes arranged in a second direction; a driving layer including a piezoelectric layer disposed between the first electrode layer and the second electrode layer and a support layer coupled to one of the front surface and the back surface of the piezoelectric layer; and a support plate coupled to the back surface of the driving layer and having a hollow portion formed in a region corresponding to each of intersections between the plurality of rows of electrodes in the first electrode layer and the plurality of rows of electrodes in the second electrode layer intersect.

Abstract: In order to solve problems with an audio device that is difficult to machine and has an increased amount of wiring, the present invention provides an audio output device comprising: a first electrode layer including a plurality of rows of electrodes arranged in a first direction; a second electrode layer disposed on the back surface of the first electrode layer and including a plurality of rows of electrodes arranged in a second direction; a driving layer including a piezoelectric layer disposed between the first electrode layer and the second electrode layer and a support layer coupled to one of the front surface and the back surface of the piezoelectric layer; and a support plate coupled to the back surface of the driving layer and having a hollow portion formed in a region corresponding to each of intersections between the plurality of rows of electrodes in the first electrode layer and the plurality of rows of electrodes in the second electrode layer intersect.

Abstract: According to the present invention, there are provided an input apparatus, a reproducing apparatus and a sound volume adjusting method in which a physical amount can be set to a desired physical amount by fine changing a physical amount slowly without user's mode switching operation after a physical amount had been coarsely changed to and reached near a desired physical amount at high speed by switching a coarse adjustment mode and a fine adjustment mode in which a physical amount is increased and decreased based on rotation speed of a control rotated by a user.