Development of an optimised, standard-compliant procedure to calculate sound transmission loss: numerical measurements

Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

“…The parameters were assumed as follows (α stat = 0.05): 1/k 1 = 0 (imaginary part of admittance) and 1/c 1 = 1.6×10 −5 (real part of admittance). The acoustic medium was modelled as a compressible, inviscid and linear fluid with the following parameters: bulk density ρ = 1.2 kg/m 3 and bulk modulus K = 142 kPa (Papadopoulos, 2003). The sound source point with the amplitude of 2 Pa was located in the upper right corner.…”

“…The average sound pressure level in the 1/3 octave band was calculated at each microphone position (16 points in each chamber) as (Papadopoulos, 2003):…”

“…Takayasu, 2007; Tarnow, 2005) and for the air layer: ρ = 1.2 kg/m 3 and K = 142 kPa (Papadopoulos, 2003). The second-order elements of 40 mm were used for the acoustic medium.…”

“…Gasses with a large difference in the impedance maximized the effective sound insulation of a layered system. An application of the finite element method to different acoustic problems was demonstrated among others by Papadopoulos (2002;2003) Papadopoulos (2002;2003) showed that a three-dimensional numerical model of an acoustic laboratory was a useful tool to calculate the sound insulation of different structures. A three-dimensional model was computationally very expensive and could be mainly used to predict the acoustic structure behaviour in a low-frequency band.…”

Obtención de velos de nanofibras de alcohol de polivinilo (PVA) sobre substratos textiles, con aplicaciones como absorbentes acústicos

“…El aislamiento del ruido aéreo siempre va a depender de la frecuencia de la fuente de emisión. [142] -Ruido impacto, cuando se produce un contacto físico de corta duración sobre la superficie de los elementos constructivos del local. El ejemplo típico viene dado por las pisadas y como estas se transmiten al piso inferior.…”