A mobile telephone in accordance with some implementations has a mobile telephone upper edge unit including a right-ear cartilage conduction unit, a left-ear cartilage conduction unit, and a linking unit linking the right-ear cartilage conduction unit and the left-ear cartilage conduction unit, the units being exposed at the mobile telephone surface; and a cartilage-conduction vibration source for transmitting vibration to the mobile telephone upper edge unit. The mobile telephone can include: a sound source unit for outputting a sound signal; an acoustic processing unit for applying correction to the sound signal output from the sound source unit, doing so on the basis of the vibration frequency characteristics of ear cartilage; a cartilage-conduction vibration source vibrated by the sound signal corrected by the acoustic processing unit; and a detection unit for detecting pressing of the mobile telephone against the ear cartilage. When the output of the detection unit is at or above a predetermined level, the acoustic processing unit performs correction to boost the gain at the high end within a frequency band in which the cartilage-conduction vibration source is vibrated to a level higher than the gain when the external auditory meatus is in an unoccluded state.