<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 389-8:2004]]> /cms/render/live/en/sites/isoorg/contents/data/standard/03/24/32440.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± 389-8:2004]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 389-8:2004 - Acoustics — Reference zero for the calibration of audiometric equipment — Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones]]> /cms/render/live/en/sites/isoorg/contents/data/standard/03/24/32440.html /cms/render/live/en/sites/isoorg/contents/data/standard/03/24/32440.html 2022-09-30