The Lattice Gas Cellular Automata (LGCA) models can be considered as an alternative to the conventional approach to the spatial dynamics simulation. The LGCA is based on a microscopic model of a physical process being simulated. Here we consider two simple LGCA models: HPP and HPPRP. They are based on a square lattice, whose nodes can be occupied by the moving particles in the HPP-model, and the moving and the rest particles in the HPPRP-model. In this paper, the possibility of a simple LGA models to simulate sound wave process in a pipe having regard to the wall features (moving obstacle and wall absorption) are investigated.

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