One day I walk on the street during listening music. I am really into the music so I could’t realize car. It was coming really fast and sound your horn. The car almost hit me and I stopped. Like as, many people listen to music on the street. To avoid dangerous situation, I made brooch which control music.
There is bluetooth module and mic. The mic recognize horn sound. To be specific, mic track volume of sound on the street. If the sound is higher than a certain degree, bluetooth send signal to music player, such as iPhone and music will pause for about 1 sec. The function can help people recognize the situation.