PROBLEM TO BE SOLVED: To provide a method of notifying a person approaching to a normal person in a blinded environment or a blind environment such as darkness. SOLUTION: A warning device to be worn by a device user 2 in a size that does not hinder walking should perform low-frequency energization to the skin of a living body regardless of sound or vibration that may not be able to detect information depending on the environment. Signal the danger with. A method with less stress is also provided by setting a current intensity that satisfies the optimum condition that suppresses an increase in heart rate due to energization. [Selection diagram] Figure 1【課題】盲人や暗闇など視覚遮断下環境の健常者に、人が接近していることを知らせる方法を提供する。【解決手段】装置利用者２に、歩行を妨げない大きさで装着する警告装置は、環境によっては情報を感知できない場合のある音や振動によらず、低周波通電を生体の皮膚に行うことで危険を知らせる。通電に伴う心拍数の増加を抑える最適条件を満たす電流強度設定によるストレスの少ない方法も備える。【選択図】図１
