In order to model the behavior of environments dominated by modal resonances, it is important to find the relationship between modal decay times and boundary conditions. The paper investigates this relationship in simple systems (rectangular duct and room), with a theoretical approach validated by FEM simulations. In the rectangular room, the classification of modes in axial, tangential, and oblique categories is helpful in assessing how the impedance of walls influences decay times. The results are compared to the Sabine equation for reverberation time. Some hints for exploiting experimentally the results are given.
(See document for exact affiliation information.)
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member Join the AES. If you need to check your member status, login to the Member Portal.
