Electric wheelchairs continue to pursue humanization and safety in design and function, among which the sound warning system is one of the important auxiliary functions. Many modern electric wheelchairs are equipped with built-in speakers or audible warnings, which have a variety of practical and safety functions: some electric wheelchairs will automatically emit audible warnings when starting, stopping, accelerating, decelerating or turning to alert surroundings . People pay attention to safety. These sound signals can effectively prevent collisions caused by line of sight obstruction or other reasons, especially in public places with a large flow of people. The sound warning system is an important embodiment of the intelligent and humanized design of electric wheelchairs. It aims to improve convenience, comfort and safety protection level during use, and provide a freer, more independent and safer living environment for people with mobility problems.