TRANSMISSION IN TIMBER FRAMED CONSTRUCTIONS Jean-Luc Kouyoumji(a), - PowerPoint PPT Presentation

22nd International Congress on Acoustics Buenos Aires, Argentina 5 – 9 September, 2016 Acoustics for the 21 st Century… REVERSE SEA TO PREDICT FLANKING TRANSMISSION IN TIMBER FRAMED CONSTRUCTIONS Jean-Luc Kouyoumji(a), Gerard Borello(b), Heinz Ferk(c) (a) FCBA, Bordeaux, jean-luc.kouyoumji@fcba.fr (b) InterAC, Toulouse, France ( c) Graz University of Technology, Austria

Content • Industrial need at the design stage Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics • Prediction of flanking transmission • Measurement • Use of EN12354 Model • Use of reverse SEA • Field transmission loss prediction Acoustics for the 21 st Century… 2

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Building system : CLT Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Building system : CLT Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Building system : CLT Acoustics for the 21 st Century…

Industrial need • Design the structure, meet all criteria need and all Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics regulations • Master all design fields • Compose a structure that don’t over estimate acoustic need • Use as much as possible simple products for assembly • Create an acoustic design tool • Agree with control body on the accuracy • Validate performance at the design stage Acoustics for the 21 st Century… 6

Design process Buenos Aires, Argentina, 5 – 9 September, 2016 • Building elements 22 nd International Congress on Acoustics Integration 2D – Walls, floors, windows , … • Construction Build-ups Integration 3D – Building elements + Junctions • Calculation method is based on SEA, EN12354 Acoustics for the 21 st Century…

Design process • Need of inputs Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics – Measurements only, 2D, R, Ln – walls, floors, – Junctions 3D, Dv,ij Kij CLF and DLF • Calculation method is based on SEA, EN12354 Acoustics for the 21 st Century…

Measurement Strategy • Measure Dvij or Kij on core structure Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics Using mapping of vibration reduction • • Measure CLF and DLF Using Reverse SEA • Acoustics for the 21 st Century… 9

Measurement Strategy • Measure Dvij or Kij on final structure Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics Using mapping of vibration reduction • • Measure CLF and DLF Using Reverse SEA • Acoustics for the 21 st Century… 10

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 3 Measurement 4 1 2 Acoustics for the 21 st Century… 1 3 2 4 2 3 1 4

Reverse SEA Methodology W W inj inj Buenos Aires, Argentina, 5 – 9 September, 2016 (1) (2) (1) (2) (1) (2) 22 nd International Congress on Acoustics W inj (3) (3) (3)    W   inj , 1                  ... . . E 0   1 d 12 1 n 21 n 1 1        W          ... . E  inj , 2    12 2 d 21 2 n 2         . . . . 0       .     . . .   .   .                 . . . ... E W   1 n nd nn n inj , n      0 Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Measurement reduction Acoustics for the 21 st Century…

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Field transmission loss prediction Acoustics for the 21 st Century…

Insulation Calculation • Combination of all paths Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics   R R   ij       10 10 R ' 10 log 10 10     ij 0 . 16 V   D R ' 10 log n T T S 0 s Acoustics for the 21 st Century…

Insulation Calculation R ij , D n,TA 100 (i) (j) F Buenos Aires, Argentina, 5 – 9 September, 2016 f Df Fd 90 22 nd International Congress on Acoustics Ff (0) 80 Dd D d 70 Emission Réception 60 (-- --), Direct sound transmission loss R Dd , R [dB] Rw= 70 (-2 ; -8) dB red ed line ne 50 40 (-  -), flanking sound transmission loss R Ff 30 (-  -), R Fd 20 (-o-), R Df 10 = 64 (-2 ; -4) 4) dB 0 (-- --), ), D nTA = dB 100 1000 10000 Global sound transmission direct and flanking Fréquence [Hz] Acoustics for the 21 st Century…

Conclusion • Flanking transmission prediction with two strategies Buenos Aires, Argentina, 5 – 9 September, 2016 22 nd International Congress on Acoustics for measurement is undergoing • A prediction model will be set using specific junction characteristics • Using reverse SEA will help in predicting Dv,ij • With the prediction tool and the growing expertise the designer will be more precise for a more competitive use of products Acoustics for the 21 st Century… 26

22 nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016 Thank you for your attention Acoustics for the 21 st Century…