Sound in space

In the previous chapters, Sound modeling: signal based approaches, and Sound modeling: source based approaches, we have studied models for sounds and sound sources. We now move a step further and examine the effects of the medium in which sound propagates: one of the most frequently encountered effect is reverberation. We will see the physical and perceptual background of reverberation, as well as some of the most known reverberation algorithms. Then we turn to the receiver, and specifically examine a human receiver with two ears. We will study how and to what extent such a receiver can gain information about the incoming direction and distance of an emitted sound, and we will review some 3-D sound processing techniques by which a virtual sound source can be positioned in some point of the space around a listener.

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