<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 8798:1987]]> /cms/render/live/en/sites/isoorg/contents/data/standard/01/62/16225.html Ïã¸ÛÁùºÏ²Ê¿ª½± standards and projects Ïã¸ÛÁùºÏ²Ê¿ª½±.org 60 /modules/isoorg-template/img/iso/favicon/red/favicon1.ico http://www.iso.org/ <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 8798:1987]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 8798:1987 - Acoustics — Reference levels for narrow-band masking noise]]> /cms/render/live/en/sites/isoorg/contents/data/standard/01/62/16225.html /cms/render/live/en/sites/isoorg/contents/data/standard/01/62/16225.html 1994-09-22