Environment Filtering offers more precise modeling of high & low frequencies in an environment.
Have you ever noticed how it gets harder to distinguish a sound the further away it is? It's not just the fact that it gets quieter, there's more to it than that. The air is literally getting in the way! What is actually happening is that the air absorbs the higher frequencies of the sound and so it not only gets quieter but it gets all muffled too. The technical name for this is "attenuation" and the Environment Filtering feature recreates this effect very accurately.
Additionally Environment Filtering allows the creation of more accurate audio environments by taking into account the type of objects that make up your surroundings and what they are made of. Different materials will absorb or reflect certain frequencies. For example in outdoor environments high frequencies are more likely to be reflected than low frequencies.
