BS ISO 13347-2:2004(2008)*BS 848-2.2:2004 Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 2 : Reverberant room method
1970BS ISO 13347-2:2004(2008)*BS 848-2.2:2004 Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 2 : Reverberant room method
2004BS ISO 13347-2:2004 Industrial fans. Determination of fan sound power levels under standardized laboratory conditions. Reverberant room method