The distribution of root-mean-square values and spectral characteristics of pulsations of pressure at a cross flow of the cylinder in a subsonic stream of gas (M = 0.44 - 0.88) are investigated. At small subsonic speed (M = 0.44) there are two field of the increased root-mean-square value of pulsations of pressure (ƒÚ =50 - 1200) owing to initial and rear separates a boundary layer, at big subsonic speed (M = 0.88) - on a field ƒÚ =900- owing to formation of a local supersonic zone with closing shockwave. At spreading a stream from a forward point speed is increased, that is accompanied by decrease of frequencies of pulsations. In a range of small subsonic speeds decrease of numbers Sh is observed at values of angle ƒÚ =40 - 600. At M = 0.54 frequencies rais up to ƒÚ =120, then are a little bit reduced, and at M = 0.9 the increase of frequencies up to a back point of the cylinder is observed.