Abstract
This report proposes a system called "CatchVoice", which enables a user to record his/her murmuring as voice memos while walking using a smartphone without looking down at its screen and also to share it with others, if he/she will, if the topic is related the area. The system software is automatically activated when the user is assumed ready to speak from his/her posture using several sensors equipped in smartphones. The user also catches other's voices shared in the system when he/she enters the area where the voices are recorded.
