Application of the Transfer Matrix and Finite Surface Size Correction to Room Acoustics Simulation

Regular paper

Arthur Van Der Harten

Foster + Partners

Tuesday 2 june, 2015, 13:40 - 14:00

0.7 Lisbon (47)

Most large scale acoustic simulations rely on user input of a Sabine or Eyring-based absorption coefficient in order to describe surface materials. However, the use of these coefficients assumes a locally reacting absorption pattern (equal absorption for waves incident from all directions). In reality, even locally absorbing finish assemblies often absorb in non-locally reacting ways when installed because of finite sample size and other conditions. Using the Transfer Matrix Method and a variation on Thomasson's finite size correction, a method for predicting the absorption of a specified finish from any location of incidence is presented.

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