SOUND-PROOF PROPERTIES OF AVIATION HEATSOUND-PROOF MATERIALS
Article is devoted to questions of decrease in negative noise and temperature impact on the person in crew cockpits and salons of flight vehicles. Properties of heatsound-proof materials are provided. The special attention is given to questions of increase of sound-proof properties of materials and options of their increase. It is shown that cellular materials on sound-proof properties exceed analogs of fibrous type. Options of increase of sound insulation of fibrous materials at the expense of change of structure of material, and also addition of layers with bigger density and smaller porosity are considered.