The paper presents a theoretical and experimental demonstration of a two-dimensional acoustic topological insulator, which exhibits an acoustic analogue of the quantum spin Hall effect. The authors design and fabricate a graphene-like acoustic crystal (AC) with a double Dirac cone structure, leading to the emergence of one-way pseudospin-dependent propagating edge states. These states are robust against various lattice defects and disorders, demonstrating topological immunity. The unique acoustic topological phenomenon offers promising applications in the design of novel acoustic devices, such as one-way sound isolators, mode switchers, splitters, and filters. The study highlights the potential of using topological states in classical wave systems, providing a new platform for wave manipulation and engineering.The paper presents a theoretical and experimental demonstration of a two-dimensional acoustic topological insulator, which exhibits an acoustic analogue of the quantum spin Hall effect. The authors design and fabricate a graphene-like acoustic crystal (AC) with a double Dirac cone structure, leading to the emergence of one-way pseudospin-dependent propagating edge states. These states are robust against various lattice defects and disorders, demonstrating topological immunity. The unique acoustic topological phenomenon offers promising applications in the design of novel acoustic devices, such as one-way sound isolators, mode switchers, splitters, and filters. The study highlights the potential of using topological states in classical wave systems, providing a new platform for wave manipulation and engineering.