音が選べる熊よけ鈴 (広告なし）

By detecting the vibration of the terminal is an application to play the sound of the bell

You may use instead of the bell of the shade bear
(Because it does not tried in an actual bear, it does not guarantee the effect)

Volume, the sensitivity of the sensor, you can choose the type of sound.



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Icon of this app is made with AndroidAssetStudio.
http://romannurik.github.io/AndroidAssetStudio/icons-launcher.html