（1.National Laboratory of Solid State Microstructures and College of Engineering and Applied Science, Nanjing University, Nanjing 210093, China）（2.Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,Tongji University, Shanghai 200092，China），et al.
Over the past three decades, the theoretical framework and technologies in the field of acoustic metamaterials have been gradually matured and completed. The development of various advanced manufacturing technologies such as additive manufacturing and femtosecond laser machining has laid a foundation for the digital design and manufacturing of complex acoustic metamaterials and subsequently greatly promotes the application of such materials. Great attention has been given to acoustic metamaterial both by academics and industry recently. Therefore establishing genetic terms including terminology and basic conception in this field is both necessary and beneficial to communication and discussion between academics, research communities and related industry. Based on the scientific concepts according to the fundamental research, this article discussed terminology related to definition, classification and classification criteria, research methods and application areas for acoustic metamaterials. We tentatively hope to provide some valuable suggestions for the establishment of technical standards related to acoustic metamaterials to be referenced by interested experts.