title: SOUND TRANSMISSION IN HELIUM AND VARIOUS GASES AT LOW PRESSURES. TECHN DOCUM REP NO. SAM-TDR-64-43.
mesh_terms: D001274:Atmospheric Pressure; D005740:Gases; D006371:Helium; D009584:Nitrogen; D010100:Oxygen; D055585:Physical Phenomena; D010825:Physics; D013016:Sound; D013026:Space Flight
chemical_list: D005740:Gases; D006371:Helium; D009584:Nitrogen; D010100:Oxygen
keywords: ATMOSPHERIC PRESSURE; GASES; HELIUM; NITROGEN; OXYGEN; PHYSICS; SOUND; SPACE FLIGHT