ACOUSTIC REGULATION

ACOUSTIC REGULATIONS FOR HOUSING ACOUSTIC FOR ROADS Acoustic performances of acoustic absorption (alpha sabine) tested in a reverberant room,conform to the new regulations concerning acoustic correction in communal spaces inbuildings (applicable since January 1996, decree of 28.10.94).S= Thanks to calculations carried out under the guidelines of CERTU and computer models such as MITRA (CSTB), a classification of anti-noise building screens can be established. In addition to being able to measure the intrinsicperformance of materials in a reverberant room (NF S 31.003 - EN 20.354) it is also possible to measure the efficiency of anti-noise wall on site (NF S 31.089). a a = ground surface area of the communal space α w x 4 0,16 x vol. α w = performance of the materialS= surface of wall covered by the acoustic material vol. = volume of the room ACOUSTICS IN ROOMS OTHER THAN FOR ACCOMMODATION After the degree of 03.04.25 relating to the limitation of noise in teaching establishments;play areas in primary schools, music rooms, study rooms, dining rooms furniture, sports halls,the following norms have to be followed according to the type of room, the performanceof the material used ( α M) and the reverberation time (TR):0,4 < TR< 0,8 for volumes ≤ 250 m
3 (A)0,6 < TR< 1,2 for volumes ≤ 250 m
3 (B)It is necessary to have a wall building cladding with an acoustic material (S) defined as follows:S=E.g: for Phonbric® : α M x TR α M = Alpha Sabine average of 500, 1.000 y 2.000 HzTR= Reverberation time under conditions A and B α M = = 0,94If TR required = 0,6 and the volume = 200 m 0,86 + 0,99 + 0,963
2 S= = 56,70 m 0,16 x 2000,94 x 0,6
2 So 56,70 m
2 Phonbric® acoustic product will be necessary. RESIDENTIAL BUILDING REGULATIONS
Site of Emission Old Regulation New RegulationImprovement of New Regulationand Old Regulation Accommodation not includingindividual garagesCommunal Interior AreaIndividual Garage of Accommodation,Communal GarageActivity Room excepting Garages54 and 5151 and 4841 and 38 With a landing building door and an entrance door54 and 51 In all other cases56 Minimum Insulation for airborne for a pink noise emitted in dB (A)Maximum Transmission of impact noise in dB (A) inprincipal rooms, taking floorcovering into accountSite of EmissionAny room in a building except terraces and balconies not situated above the principal room, communal building staircases if there is a lift and service roomsIndividual Heating UnitMechanical Building ventilation Low OutputEquipment other houseCommunal area and 5359 and 563 dB (A)Same, with a landing door and an entrance door13 dB (A) In all other cases5 dB (A) (Individual Garage)idem (Communal Garage)3 dB (A) 70655 dB (A)Maximum Transmission of impact noise in dB (A) inprincipal rooms, taking floorcovering into accountMinimum insulationfor road noise in dB (A) INTERIOR and 50 (1) NewNew5 dB(A) in principal rooms3 dB(A) in kitchens supplier 41 and 38In all events51 and 48 (individual Garage)56 and 53 (Communal Garage)56 and 53 and 50 (2)NewNo regulation 30 and 3535 and3830 and38 30 and3530 and3530 and35 Insulation not defined No regulationIndividual Building air conditioning Unit35 30 New3 dB(A) in kitchens 35 EXTERIOR In the new regulations, absorbent coatings are use in communal areas as follows:A= 1/4 Surface area = α w x Surface coated, - A being the area of absorption equivalent to the coatingNew edition N°6 2005

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