Great Old One
Maybe we need to add rules for more granular representation of sound, the same way we do for light.
I.e. "this spell emits bright sound out to a 300 foot radius, and dim sound out to 600 feet."
You can certainly do that as house rules, but IMHO there is no need to complicate the system with this, or to add further radii for the scent of the ozone, of the radius that gives you goosebumps.
Especially since the lighting rules don't prevent a light from being seen from far away, the radii given as for the actual illumination provided, not the same thing at all.