The indoor ambient noise level excludes noise contributions from.. (a)Teaching activities within the school premises, such as noise from staff, students and equipment within the building or in the playground. Noise from adjacent spaces will be addressed by Airbourne and Impact sound insulation requirements. (b) Equipment used in the space (e.g. power tools, CNC machines, dust and fume extract equipment, compressors, computers, overhead projectors, etc). However these noise sources should be considered in the design.