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Camberwell Library21 March 20133/ Design Standards3. Design Standards3.1 Introduction3.1.1 There is no formal regulation relating to the required acoustic performance of a library.However, good practice would be to apply criteria applied in school design.3.1.2 To this end, we propose the use of Building Bulletin 93 (BB93), which is the current means ofdetermining acoustic criteria in school buildings.3.2 BB93 Acoustic Design of Schools – A Design guide3.2.1 The overall objective of BB93 is to provide acoustic conditions in schools which: Facilitate clear communication of speech between teacher and student, and between students,and Do not interfere with study activities3.2.2 In order to achieve this objective, section 1.1 of BB93 specifies performance standards on thefollowing topics: Indoor ambient noise levels in unoccupied spaces, Airborne sound insulation between spaces, Airborne sound insulation between circulation spaces and other spaces used by students Impact sound insulation of floors, Reverberation in teaching and study spaces, Sound absorption in corridors, entrance halls and stairwells, and Speech intelligibility in open-plan spaces.3.3 Section 1.1 of BB93 provides performance standards for new school buildings in accordancewith the Building Regulations.3.4 For the purposes of the library, therefore, appropriate design standards recommended in BB93have been applied. These are listed below for clarity:RoomInternal Ambient NoiseLevel, L Aeq,30minInternal Noise LevelsL A1,30min (dB)Library (Study Areas) 35 dB 55Library (Resource Area) 40 dB NATable 1: Internal Ambient Noise Levels for Schools3
Camberwell Library21 March 20133/ Design StandardsSpace BB93 Designation T mf (seconds)Library (Study Area) Library Study area
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