Cellular phone with high-quality sound reproduction capability

Abstract

In a cellular phone, stereophonic sound reproduction of music etc. is realized by using a microphone and a speaker of the cellular phone as stereophonic speakers. By the stereophonic sound reproduction function, radio broadcasting from FM stations, streaming sound from the Internet, etc. are reproduced by the cellular phone. The speaker and the microphone are removed from the front of the housing of the cellular phone (where a display and operation buttons are mounted) and are placed on the back of the housing, thereby the diameters of the speaker and the microphone are enlarged and thereby wide-range and high-volume-level sound reproduction is realized. The speaker and the microphone are preferably implemented by low-profile flat-panel speakers that are functionally equivalent. Further, by the removal of the speaker and microphone from the front of the housing, the sizes of the display and the operation buttons are enlarged, thereby the viewability of the display and the operability of the operation buttons are improved. Such features are effectively realized in, for example, a folding cellular phone that can be unfolded to an angle larger than 180°.

Dependencies are inferred from the claim text.