Cessation. Acta Acustica united with Acustica (Acta Acust united Ac), was published together with the European Acoustics Association (EAA). It was an international, peer-reviewed journal on acoustics. It published original articles on all subjects in the field of acoustics, such as General Linear Acoustics, Nonlinear Acoustics, Macrosonics, Aeroacoustics, Atmospheric Sound, Underwater Sound, Ultrasonics, Physical Acoustics, Structural Acoustics, Noise Control, Active Control, Environmental Noise, Building Acoustics, Room Acoustics, Acoustic Materials and Metamaterials, Audio Signal Processing and Transducers, Computational and Numerical Acoustics, Hearing, Audiology and Psychoacoustics, Speech, Musical Acoustics, Virtual Acoustics, Auditory Quality of Systems, Animal Bioacoustics, History of Acoustics.