Create a prim box or sphere, as you enter it you near 100% audio of what ever is defined in a script/edit panel/etc
when you have multiple ones overlapping they will mix as you move through them and as you attinuate as you move further away but instead like now where it's a single point of audio it's a volume of audio. to help expand on the depth and detail of scenes
Details are below (if you know you know where i go this from)
Emitter Shape - Choose between a point emitter or a volumetric emitter (also known as an audio volume) if you want a sound to fill a bigger or smaller area. Choose from the following:
Point - A point emitter is appropriate for smaller, focused sounds that originate from a specific coordinate.
Cuboid - A volumetric emitter, shown as a green box. Cuboid Size controls how far the sound goes before falling off. Enter XYZ values to change the sound shape. A typical use of a cuboid is filling a larger space with ambient sound, whether that is a room in a building or an outdoors environment. For example, a field of crickets at night.
Sphere - A volumetric emitter, shown as a green ball. Similar to the cuboid type, you can specify a Sphere Radius that determines how much area the sound fills before falling off. A sphere is useful to fill curved spaces where a cuboid may feel unnatural.