The term 'SHOCKING SOUND' can be summarized by two words: BOO and ZAP. BOO is an interjection used to express surprise, fear, or joy. It is often used to startle someone or to express a reaction to something unexpected. ZAP is an informal verb meaning to move quickly or to cause a sudden change. It is often used to describe the sound of a sudden electrical discharge, such as lightning. Together, these two words can be used to describe a sound that is both sudden and shocking.