This standard is installed at a specified height on a sound-insulating wall separating two rooms in a designated test facility and is covered with a cloth.
KS F 2866-2003 history
2023KS F 2866-2023 Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it
0000 KS F 2866-2003(2018)
2003KS F 2866-2003 Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it