At first, the acoustic excitation signal should be generated. A sine sweep can be made with the Matlab function chirp and the MLS signal can be made with the files mls, where the desired order must be specified.
After playback of the sound, the recorded signal of the room must be deconvolved, using either the function dechirp or demls. This functions will provide the room's impulse response (RIR).
With the RIR, the room acoustic paramenters can be extracted using either Chu, Hirata or Lundeby methods, respectively with chuparam, hrtparam and ldbparam. The parameters will be printed in a text file, called tabela.txt.
This toolbox was the used for developing a room acoustics open software at the Universidade de São Paulo. The java based AcMus software can be freely downloaded at http://gsd.ime.usp.br/acmus/soft.html |
