In twenty essays on subjects such as noise, acoustics, music, and silence, Keywords in Sound presents a definitive resource for sound studies, and a compelling argument for why studying sound matters. Each contributor details their keyword's intellectual history, outlines its role in cultural, social and political discourses, and suggests possibilities for further research. Keywords in Sound charts the philosophical debates and core problems in defining, classifying and conceptualizing sound, and sets new challenges for the development of sound studies.