I want to invent headphones for the blind, which are self-sufficient and enlightening. The invention of headphones is more similar to birds, submarines and patents. I want to invent something. I've been reading blindly recently, and I've seen things, roads and accidents around me. Although it is a blind guide dog, it is only a waste of money and labor to train ordinary dogs. I want to invent a guide earphone, which is cheap and practical. Each main power guide earphone sends out ultrasonic waves to the surroundings first, and pushes forward like waves. In case of danger, the guide earphone immediately tells the Lord: Please change the route before the danger, and the guide earphone will accidentally drop. It is said that the invention of guide headphones is attributed to the discovery that bats can fly at night. After a series of explorations, I hope that before I invent it, I can imagine a similar machine to benefit blind friends and let me walk.
Quote poems and praise people, and the icing on the cake can be fascinating.