Asymptotic diffraction results, valid at high frequencies for an infinite wedge, are used to derive an equivalent edge source strength, which can then be applied to the finite edges of a loudspeaker cabinet. Diffraction amplitudes are about 73% larger than earlier work and display a strong dependence on observation angle. Computation of the diffraction is very efficient when carried out in the time domain, and second- and third-order effects can be included. Comparison with a boundary-element calculation in the literature confirms the basic validity of the theory, and experiments show the expected inversion of the diffracted sound on the two sides of the shadow boundary.
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 and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.