Systems including noise suppression devices for personal impact protection systems are provided. One such system includes an inflator having an inflator discharge port; a flexible permeable inner tube configured to receive gas from the inflator via the inflator discharge port; and a flexible outer tube surrounding the inner tube and configured to receive gas from the inner tube, the outer tube including one or more outer tube discharge ports. Another such system includes an inflator having an inflator discharge port; a flexible non-permeable tube configured to receive gas from the inflator via the inflator discharge port; and a permeable gas diffuser element disposed in or adjacent to the tube, the diffuser element being configured to receive gas from the inflator via the inner tube.