US Patent 11871810 Communication helmet

A communication helmet includes a helmet, a fixing belt, and a speaker module. The helmet has a head cavity for protecting a human head. Such helmet may be any known or new types of helmets for protecting soldiers, riders, policemen, working men in architecture building or in another engineering facilities, or for any other purposes and uses. The fixing belt has two belt ends connecting to two sides of the helmet. The fixing belt and the helmet together form a head container for fitting the human head.