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Deaf Honk is specially designed for the elders with bad hearing.
When the elders walk on the road,Deaf Honk can detect the horn's acoustic frequency,it will vibrate when it detects the horn.
It's just like the usual hearing aid,a pair of Deaf Honk can detect right side and left side separately,it helps the users recognize the direction of the car from the vibration of the ear side. Left ear vibrates means the horn comes from left side;right ear vibrates means the horn comes from right side;when both right and left side vibrate means the horn comes from the back.