The foregoing has described examples of the audio output apparatus 1 in which the facing surface 2a and the relative surface 3a are inclined with respect to the central axes P and Q, respectively, and the axial direction of the fulcrum shaft 21 is orthogonal to the facing surface 2a and to the relative surface 3a. However, the facing surface 2a, the relative surface 3a, and the axial direction of the fulcrum shaft 21 may be oriented as described below (see FIGS. 23 to 30).

For example, an audio output apparatus 1B can be configured such that the facing surface 2a and the relative surface 3a are orthogonal to the central axes P and Q, and that the axial direction of the fulcrum shaft 21 is orthogonal to the facing surface 2a and to the relative surface 3a (see FIGS. 23 and 24).

In the audio output apparatus 1B, the facing surface 2a and the relative surface 3a are along a direction orthogonal to the central axes P and Q. Therefore, the placement space 4a in the base body 2 and the component placement space 3d in the rotating body 3 are in a simpler shape, the individual units can be placed in the placement space 4a and the component placement space 3d more flexibly, and the audio output apparatus 1B has a higher degree of flexibility in design and can be made smaller in size.