What is claimed is: 1. An audio apparatus comprising: a communicator configured to receive an audio signal from an audio source providing apparatus; an osteophony speaker; a location sensor configured to sense a position of the osteophony speaker; and an audio signal processor configured to modify the audio signal according to the position of the osteophony speaker, wherein, if the position of the osteophony speaker is located in an ear, the audio signal processor modifies the audio signal to provide a first modified audio signal, and if the position of the osteophony speaker is located outside the ear, audio signal processor modifies the audio signal to provide a second modified audio signal, wherein the osteophony speaker outputs one of the first modified audio signal and the second modified audio signal. 2. The apparatus as claimed in claim 1, wherein the audio apparatus is capable of being combined with glasses apparatus. 3. The apparatus as claimed in claim 2, further comprising: a combination sensor to sense combination with the glasses apparatus. 4. The apparatus as claimed in claim 3, wherein the audio signal processor, if it is sensed by the combination sensor that the audio apparatus is combined with the glasses apparatus, stops receiving a first audio signal from the audio source providing apparatus, controls the communicator to receive a second audio signal from a display apparatus which operates in an interlocked manner with the glasses apparatus, and controls the osteophony speaker to output the second audio signal. 5. The apparatus as claimed in claim 1, in response to the audio signal being the first modified audio signal, the audio signal processor modifies frequency response characteristics so that the audio signal is reproduced grandly. 6. The apparatus as claimed in claim 1, in response to the audio signal is the second modified audio signal, the audio signal processor modifies frequency response characteristics so that the audio signal is reproduced clearly. |