Building Acoustics

Sound transmission in buildings. Flanking transmission. 339 the prospective absorber. Similar conditions are imposed on the rece ...

340 Building acoustics The constant ε is equal to 1.0 in the case of totally absorbing sidewalls and equal to 2.0 for totally re ...

Sound transmission in buildings. Flanking transmission. 341 Figure 9.13 Sound reduction index Rcl of suspended ceiling of 9.5 mm ...

342 Building acoustics in Chapter 6 (see sections 6.5.2.1 and 6.5.4). The plasterboard had a mass per unit area of 9.5 kg/m^2 , ...

Sound transmission in buildings. Flanking transmission. 343 suspended ceiling as an introduction to the general case where a num ...

344 Building acoustics windows in an outer wall etc. A note of warning: Reduction index product data for small units such as gri ...

Sound transmission in buildings. Flanking transmission. 345 for direct transmission through the 50 mm concrete slab, which has a ...

346 Building acoustics The flanking sound reduction index Rf, involving the flanking element of area Si in the sending (source) ...

Sound transmission in buildings. Flanking transmission. 347 To be able to represent the reduction index Rij by the properties of ...

348 Building acoustics (^) , 10 lg S , 2 ij ij v ij ij RR S RD SS + ⎛⎞ =++⋅⎜ ⎜ ⎝⎠ ⎟ ⎟ (9.33) where we have introduced the direct ...

Sound transmission in buildings. Flanking transmission. 349 The reduction indexes calculated are defined by the ratio of the pow ...

350 Building acoustics not by the velocities. The consequences are that the reduction index R 13 will be equal to Dv,13 but we s ...

Sound transmission in buildings. Flanking transmission. 351 (^) ij v ij, 10 lg ij , ij l KD aa ⎡ ⎤ =+⋅⎢ ⎥ ⎢⎣ ⎥⎦ (9.41) where lij ...

352 Building acoustics (9.43) 2 12 2 13 8.7 5.7 (dB), 8.7 17.1 5.7 ( dB), KM KMM =+⋅ =+ ⋅+⋅ where M is the logarithmic ratio mas ...

Sound transmission in buildings. Flanking transmission. 353 Here we shall present results from a couple of special cases where t ...

354 Building acoustics 63 125 250 500 1000 2000 4000 Frequency (Hz) 0 10 20 30 40 50 60 70 80 D and ij K (dB)ij Dij Kij Wooden f ...

Sound transmission in buildings. Flanking transmission. 355 by the absorption length a. As a first approximation, the standard s ...

356 Building acoustics other curves show the result when the floor is improved by adding a floating floor as well as a freely su ...

Sound transmission in buildings. Flanking transmission. 357 based on the power radiated from the various surfaces in the receivi ...

358 Building acoustics EN 12354–2: 2000, Building acoustics – Estimation of acoustic performance of buildings from the performan ...