| 摘要 |
<p>Disclosed is a mobile device comprising: an input receiving unit receiving one or more inputs through a user interface; a control information determining unit determining control information corresponding to an operation of an external device on the basis of one or more inputs, the control information including a first symbol and a second symbol; a sound wave data generating unit generating sound wave data corresponding to the control information; and an output unit outputting a sound wave corresponding to the sound wave data through a sound wave generating device. Here, the sound wave data generating unit determines a first frequency corresponding to a first symbol, a second frequency corresponding to a second symbol, and generates the sound wave data on the basis of the first frequency and the second frequency, and the sound wave data includes a portion corresponding to the first frequency and a portion corresponding to the second frequency.</p> |
