I want to invent a guide earphone. Nature has given us a lot of inspiration, so human beings have invented and created something. For example, humans invented airplanes by imitating birds and submarines by imitating fish. Invention is not a scientist's patent. I also want to invent something. Recently, I read that blind people lose their eyes and can't see what is happening around them. When crossing the road, accidents are easy to happen. Although some blind people have guide dogs, it is not only a waste of money, but also a waste of time and effort for a guide dog to become a well-trained guide dog from an ordinary dog. The guide earphone I want to invent is cheap and practical. Whenever the owner turns on the switch, it starts to work. The guide earphone first emits ultrasonic waves around, and the ultrasonic waves move forward like waves. When it is in danger, it will be immediately transmitted to the receiver of the guide earphone, and the guide earphone will immediately tell its owner: In this way, the possibility of accidents for blind people is greatly reduced. To say that the invention of the headset for the blind is attributed to bats. More than 1 years ago, scientists discovered that bats can fly at night, and after a series of explorations, the term "ultrasound" was born. I hope that in the future I will invent a machine similar to what I imagine now to benefit mankind, so that blind friends can walk as conveniently as we do.