Sound Ricochet is a term used to describe the phenomenon of sound bouncing off of surfaces and echoing back. It is also known as an ECHO, and is created when sound waves are reflected off of a surface such as a wall or other object. The term 'Sound Ricochet' is derived from the French word 'ricocher, ' which means 'to rebound.' This phenomenon can be heard in many places, such as in a canyon or a large room with hard surfaces. The term 'ECHO' is often used interchangeably with Sound Ricochet, as they both refer to the same phenomenon.