Sound-ranging is a term used to describe a method of determining the location of enemy artillery by recording and analyzing the sound waves generated by the firing of their weapons. Some synonyms for sound-ranging include acoustic detection, sonic locating, and audio ranging. Other related terms that can be used interchangeably with sound-ranging include acoustic ranging, sound triangulation, and echolocation. These methods have been used for military intelligence gathering, as well as for scientific research and ecological monitoring purposes. The use of sound-ranging technology has advanced over time, and now includes more sophisticated tools such as laser-based systems and underwater acoustic sensors.