The Wwise Project Adventure

A typical condition of most game environments is having a game object become either obstructed by another object (such as a wall or beam) or occluded in a room where the listener can only hear a few muffled sounds leaking through the walls.

The following diagrams illustrate examples of occlusion and obstruction.

Example of an Obstruction

Obstruction can be modeled by applying a volume control and/or a Low Pass Filter (LPF) affecting only the direct path of the signal. The environmental reflections are unaffected.

Example of an Occlusion

Occlusion can be modeled by applying a volume control and/or an LPF affecting both the direct path and the environmental reflections of the signal.

Here is a diagram of the obstruction/occlusion processing pipeline inside the sound engine:

Occlusion Processing Pipeline