Sounds, Ecologies, Musics poses exciting challenges and provides fresh opportunities for scholars, scientists, environmental activists, musicians, and listeners to consider music and sound from ecological standpoints. Authors in Part I examine the natural and built environment and how music and sound are woven into it, how the environment enables music and sound, and how the natural and cultural production of music and sound in turn impact the environment. In Part II, contributors consider music and sound in relation to ecological knowledges that appear to conflict with, yet may be viewed as complementary to, Western science: traditional and Indigenous ecological and environmental knowledges. Part III features multidisciplinary and interdisciplinary approaches by scholars, scientists, and practitioners who probe the ecological imaginary regarding the complex ideas and contested keywords that characterize ecomusicology: sound, music, culture, society, environment, and nature. A common theme across the book is the idea of diverse ecologies. Once confined to the natural sciences, the word "ecology" is common today in the social sciences, humanities, and arts - yet its diverse uses have become imprecise and confusing. Engaging the conflicting and complementary meanings of "ecology" requires embracing a both/and approach. Diverse ecologies are illustrated in the methodological, terminological, and topical variety of the chapters as well as the contributors' choice of sources and their disciplinary backgrounds. In times of mounting human and planetary crises, Sounds, Ecologies, Musics challenges disciplinarity and broadens the interdisciplinary field of ecomusicologies. These theoretical and practical studies expand sonic, scholarly, and political activism from the diversity-equity-inclusion agenda of social justice to embrace the more diverse and inclusive agenda of ecocentric ecojustice.