Introducció de l'elevació als sistemes de reproduccio de so espacial basats en Wave-Field Synthesis mitjançant l'ús de l'HRTF

Abstract

[CA] En aquest treball es proposa el disseny de filtres HRTF per omplir el buit de la reproducció en elevació. S'han dissenyat filtres per diferents mètodes i han sigut avaluats mitjançant tests subjectius que demostren com de complex és el reconeixement o localització de fonts sonores a l'espai en elevació.

EN] The study of elevation is an interesting subject of research in many signal processing applications, ranging from location and reproduction of sound sources to object location in electromagnetic exploration systems. Applied to the Head Related Transfer Function HRTF, it can be used to get 3D spatial reproduction systems based on Wave-field Synthesis (WFS). WFS system is a spatial sound reproduction system that can synthesize an acoustic field by means of horizontal loudspeaker arrays. However, even when several horizontal arrays are located in parallel in the vertical dimension, the desired reproduction effect cannot be obtained in elevation. In this work, we propose to design HRTF filters in order to fill the gap in the reproduction in elevation. Some HRTF filters have been designed by different methods, having been evaluated by subjective tests that show the high complexity of recognizing or locating sound sources in elevation in the space