IEC 60704-2-2:2009

IEC 60704-2-2:2009 provides the methods of determination of airborne acoustical noise emitted by electric fan heaters, designed for placing on the floor, table or counter,etc., or for wall mounting supplied from mains or from batteries. The main changes from the previous edition are as follows: provisions with regard to measurement uncertainty and standard deviation for declaration and  verification have been included in the scope.
This publication is to be read in conjunction with IEC 60704-1:2010.