Prediction of airflow resistivity of fibrous acoustical media having two fiber components and a distribution of fiber radii

摘要: Abstract Presented here is a new airflow resistivity (AFR) prediction model that accounts for situations in which fibrous medium comprises more than one fiber component, and when the radius of each component varies within certain range. The study started with evaluation existing AFR models, were mostly developed single-component media uniform (SCUR). After comparing SCUR results measurements samples, Tarnow’s was shown to yield reasonable accurate predictions chosen as starting point further development. Tarnow first modified make it capable predicting two-component radii (TCUR). It then by adding effect distributions TCUR models making various (TCVR). TCVR accuracy verified on different samples having unknown size distribution. Excellent agreement obtained adjusting distribution models. A second, rigorous test, involved material based measured Again, excellent found.