Building Acoustics

260 Building acoustics (^) () ( ) 2 2 00 00 22 4 2 ''. c ckSF pW AAm ρ ρ πω =⋅=   (6.119) The sound pressure p ́ will then dri ...

Sound transmission 261 2 00 n 2 00 4 10 lg. caF L pA ⎧ ρ ⎫ =⋅⎨ ⎬ ⎩⎭  (6.125) For the sound reduction index we shall be looking ...

262 Building acoustics given for R and Ln by Equations (6.74) and (6.106) we get, as expected, the same result as in Equation (6 ...

Sound transmission 263 ISO 717–1: 1996, Acoustics – Rating of sound insulation in buildings and of building elements. Part 1: Ai ...

264 Building acoustics Macadam, J. A. (1976) The measurement of sound radiation from room surfaces in light- weight buildings. A ...

CHAPTER 7 Statistical energy analysis (SEA) 7.1 INTRODUCTION We have several times referred to statistical energy analysis, SEA ...

266 Building acoustics sound or vibration levels vary with frequency, i.e. in octave or one-third-octave bands, are normally suf ...

Statistical energy analysis (SEA) 267 Energy will be lost by radiation to the surroundings and by the exchange of energy by a th ...

268 Building acoustics inside a subsystem. Implicitly; all quantities E, n and W are functions of frequency and generally we sha ...

Statistical energy analysis (SEA) 269 where η is the loss factor. It is assumed that the RMS-value is taken as a mean value over ...

270 Building acoustics The terms on the diagonal represent the total loss factor of each subsystem. It should be noted that in t ...

Statistical energy analysis (SEA) 271 where p represents the acoustic pressure in the room and u is the velocity we are seeking. ...

272 Building acoustics An estimate for the radiation factor σ could be 0.05–0.1 in the chosen frequency band as the critical fre ...

Statistical energy analysis (SEA) 273 flanking transmission. These models will, however, become quite complicated for multiple l ...

274 Building acoustics Figure 7.6 Sound pressure level difference between two rooms in a flanking transmission laboratory (Build ...

Statistical energy analysis (SEA) 275 Maidanik, G. (1962) Response of ribbed panels to reverberant acoustic fields. J. Acoust. S ...

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CHAPTER 8 Sound transmission through multilayer elements 8.1 INTRODUCTION Using the methods presented in Chapter 6, we may, with ...

278 Building acoustics mentioned in the introduction, the wall elements may be mechanically coupled in different ways. We shall ...

Multilayer elements 279 way of the cavity. As a first approximation to this case, which may well be found in practice, we shall ...