| 摘要 |
<p>It is possible to protect user's ear from a sudden large sound volume and enable the user to surely and clearly hear a sound as information on an alarm object. If a signal arrival occurs when the user holds a mobile telephone (1) at the communication position and listens to a message output from an audio output unit (8), a control unit (17) causes vibration from a vibrator (27) as an alarm to call user's attention. At the timing when the user has sufficiently removed the mobile telephone (1) from his/her ear, the control unit (17) causes the audio output unit (8) to output an arrival sound of large volume. Thus, it is possible to surely protect the user's ear from a sudden large volume. Even when an arrival notification music composition is used as an arrival sound, the user can surely and clearly hear the sound as information on the alarm object.</p> |
