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General provisions for Section 7
7.1–7.8NI-wide·Technical Booklet G Resistance to the Passage of Sound
This Section describes how to determine the amount of additional absorption to be used in corridors, hallways, stairwells and entrance halls that give access to flats, maisonettes and rooms for reside
flatsdwellingsoundreverberationMethod A – Entrance halls, corridors and hallways
7.9NI-wide·Technical Booklet G Resistance to the Passage of Sound
For entrance halls, corridors or hallways, cover an area equal to or greater than the floor area, with a Class C absorber or better. It will normally be convenient to cover the ceiling area with the a
flatsdwellingsoundreverberationMethod A – Stairwells and stair enclosures
7.10NI-wide·Technical Booklet G Resistance to the Passage of Sound
For stairwells or a stair enclosure, calculate the combined area of the stair treads, the upper surface of the intermediate landings, the upper surface of the landings (excluding ground floor) and the
flatsdwellingsoundreverberationstairsMethod A – Application of absorptive material
7.11NI-wide·Technical Booklet G Resistance to the Passage of Sound
Method A can generally be satisfied by the use of proprietary acoustic ceilings. However, the absorptive material can be applied to any surface that faces into the space.
flatsdwellingsoundreverberation