The 12th International Conference on Theoretical and Computational Acoustics (ICTCA 2015) will take place from October 11 to 16, 2015, in Hangzhou, China. It will be an ideal forum for active researchers in various fields related to Ocean Acoustics, Seismo-Acoustics, Aeroacoustics, Computational Methods, Structural Acoustics, Supercomputing, Animal Bioacoustics, etc., to discuss the state-of-the-art development, exchange ideas, examine their results, and to stimulate future research in experimentation, theory, computation and field applications in acoustics in general.