<p>A portable terminal device (100) includes a plurality of operation units (for example, a plurality of operation keys (11)) that are operated by a user; a detection unit that detects which operation unit of the plurality of operation units is operated; and a directional speaker (for example, a parametric speaker (30)). The portable terminal device (100) further includes an audio control unit that controls the directional speaker so that an audio image is formed at a position corresponding to the position of the operation unit operated by the user among the plurality of operation units.</p>
