Optimizing the Directivity of Multiway Loudspeaker Systems
1 École Nationale d'Ingénieurs de Brest, Université Européenne de Bretagne (UEB), Laboratoire Brestois de Mécanique et des Systèmes (LBMS), EA 4325, Technopôle Brest-Iroise, CS 73862, 29238 Brest Cedex 3, France
2 TELECOM Bretagne, Institut TELECOM, Université Européenne de Bretagne (UEB), CNRS UMR 3192 Lab-STICC, CS 83818, 29238 Brest Cedex 3, France
EURASIP Journal on Audio, Speech, and Music Processing 2010, 2010:928439 doi:10.1155/2010/928439Published: 23 August 2010
In multiway loudspeaker systems, digital signal processing techniques have been used to correct the frequency response, the propagation time, and the lobbing errors. These solutions are mainly based on correcting the delays between the signals coming from loudspeaker system transducers, and they still show limited performances over the overlap frequency bands. In this paper, we propose an enhanced optimization of relevant directivity characteristics of a multiway loudspeaker system such as the frequency response, the radiation pattern, and the directivity index over an extended transducers' frequency overlap bands. The optimization process is based on applying complex weights to the crossover filter transfer functions by using an iterative approach.