Sounds from airliners are harmful to the environment. Therefore, the standards for noise on the ground of the International Civil Aviation Organization (specialized agency of the United Nations) are regularly tightened, and failure to comply with them threatens air carriers with large fines. Now Russia does not have its own civil aircraft certified according to the new requirements. Perm Polytech scientists have developed a technology that will reduce the noise level of airliners and ensure the competitiveness of the Russian Federation. For the first time in world practice, they modeled processes in multilayer sound-absorbing structures, taking into account the conditions occurring in real aircraft engines.