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

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

Aug 25, 2022 163 likes •445 views

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),

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

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Industrial need at the design stage
  • Prediction of flanking transmission
  • Measurement
  • Use of EN12354 Model
  • Use of reverse SEA
  • Field transmission loss prediction

2

Content

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Building system : CLT

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Building system : CLT

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Building system : CLT

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Design the structure, meet all criteria need and all

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

6

Industrial need

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Building elements

– Walls, floors, windows, …

  • Construction Build-ups

– Building elements + Junctions

  • Calculation method is based on SEA, EN12354

Design process Integration 2D Integration 3D

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Need of inputs

– Measurements only, – walls, floors, – Junctions

  • Calculation method is based on SEA, EN12354

Design process 2D, R, Ln 3D, Dv,ij Kij CLF and DLF

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Measure Dvij or Kij on core structure
  • Using mapping of vibration reduction
  • Measure CLF and DLF
  • Using Reverse SEA

9

Measurement Strategy

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Measure Dvij or Kij on final structure
  • Using mapping of vibration reduction
  • Measure CLF and DLF
  • Using Reverse SEA

10

Measurement Strategy

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement

1 2 4 3 1 2 4 3 1 2 4 3

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Reverse SEA Methodology

     

                                                                                  

n , inj 2 , inj 1 , inj n 2 1 nn nd n 1 n 2 21 d 2 12 1 n 21 n 1 12 d 1

W . . W W E . . E E ... . . . . . . . . . . ... . . ... (2) (3) (1)

W inj

(2) (3) (1)

W inj

(2) (3) (1)

W inj

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Measurement reduction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Field transmission loss prediction

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Combination of all paths

Insulation Calculation

          

  ij 10 R 10 R

ij

10 10 log 10 ' R

s T n

S T V 16 . log 10 ' R D  

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Insulation Calculation Rij ,Dn,TA

10 20 30 40 50 60 70 80 90 100 100 1000 10000 Fréquence [Hz] R [dB]

Df (i) (j) f F (0) Ff Fd Dd Emission Réception D d

(--

  • -), Direct sound transmission loss RDd,

Rw= 70 (-2 ; -8) dB red ed line ne (--), flanking sound transmission loss RFf (--), RFd (-o-), RDf (--

  • -),

), DnTA = = 64 (-2 ; -4)

4) dB

dB

Global sound transmission direct and flanking

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

  • Flanking transmission prediction with two strategies

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

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Conclusion

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22nd International Congress on Acoustics Buenos Aires, Argentina, 5 – 9 September, 2016

Acoustics for the 21st Century…

Thank you for your attention