S (a software established by the laboratory CRESSON in France).C.H.A.O.S can mark all kinds of noise sources and social sound-scapes in maps following a time sequence.

• S，通过在一个“时间轴”上标识各种类型的噪声源、各种有“社会-文化”价值的声音场景，实现对城市声音环境的高质量再现。