The term SUDDEN NOISE can be summarized by two crossword solutions: BANG and CLAP. BANG is a loud, sharp sound usually made by an explosion or collision. It is often used to describe the sound of a gunshot or a door slamming shut. CLAP is a sudden, sharp sound made by striking two surfaces together, such as hands clapping. It is often used to express approval or appreciation. Both BANG and CLAP are examples of sudden noises that can be heard in everyday life.