Device and method for simulation of the presence of one or more sound sources in virtual positions in three-dimensional acoustic space

摘要

A method for simulating the presence of one or more sound sources in virtual positions (8) in acoustic space (7) using a system that comprises:- (a) A plurality of loudspeakers (2) located in an environment (1) in which the listener is situated; and (b) A means designed to drive the loudspeakers independently of one another, characterised in that the behaviour of the direct sound and reflected sounds is reconstructed separately in a virtual environment which lies outside the area in which the listener is situated, wherein: (i) The distance between the position of the virtual source and the listener's position is calculated; (ii) The direction of the line which joins the source to the listener is calculated; (iii) A subset of loudspeakers is selected which will be used to transmit the direct sound and a set of reflected sounds using the direction of a line that joins the listener to the sound source or the area of the virtual wall at which the reflection takes place; (iv) The amplitude components relating to the emissions of the selected loudspeakers (12) are calculated in such a way that the vector sum of the sound emitted by the loudspeakers is equivalent to the direct sound emitted by the virtual source (10) and/or the reflected sound emitted by the virtual source.