Heated below temperature stratified atmospheric layer is unstable and convection flow can be developed in such an area. Convection happens because warm less dense air goes up while cooler air comes down. Infrasound can initiate convection flow and being amplified by the flow. The process of infrasound-convection interaction is considered in the present paper. The model of convection in a compressible fluid is considered and analyzed. The conditions of infrasound amplification are obtained.