<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 131:1979]]> /cms/render/live/es/sites/isoorg/contents/data/standard/00/39/3944.html Normas y proyectos de Ïã¸ÛÁùºÏ²Ê¿ª½± Ïã¸ÛÁùºÏ²Ê¿ª½±.org 60 /modules/isoorg-template/img/iso/favicon/red/favicon1.ico http://www.iso.org/ <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 131:1979]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 131:1979 - Acoustics — Expression of physical and subjective magnitudes of sound or noise in air]]> /cms/render/live/es/sites/isoorg/contents/data/standard/00/39/3944.html /cms/render/live/es/sites/isoorg/contents/data/standard/00/39/3944.html 1996-03-07