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A new mechanisms for damping of slow magnetosonic waves (SMW) by pressureinduced oscillations of the ionization degree is proposed. An explicit formulafor the damping rate is quantitatively derived. Physical conditions where thenew mechanism will dominate are briefly discussed. The ionization-recombinationdamping is frequency independent and has no hydrodynamic interpretation.Roughly speaking large area of partially ionized plasma are damper for bassesof SMW while usual MHD mechanisms operate as a low pass filter. The deriveddamping rate is proportional to the square of the sine between the constantmagnetic field and the wave-vector. Angular distribution of the spectraldensity of SMW and Alfv\'en waves (AW) created by turbulent regions and passingthrough large regions of partially ionized plasma is qualitatively considered.The calculated damping rate is expressed by the electron impact cross sectionof the hydrogen atom and in short all details of the proposed dampingmechanisms are well studied.

Slow magnetosonic wave absorption by pressure induced ionization-recombination dissipation