Here's an example of my question to make my explanation a bit easier.
Say a decent loudspeaker plays a tune at loud volume 100m away from me and another speaker plays the same tune at lot lower volume 1m away from me. Say the tunes will be just as loud in my ears, and if I'm understanding this correctly we could measure the decibel and record the sounds and they would be equal as well (if we ignore the fact that certain wavelengths travel better through air than others). But a person standing a further 100m away would only hear the loudest speaker (now 200m away), and not the low volume one (101m away). The dB and the sounds wouldn't be identical anymore.To me this doesn't make sense as sound is just air, and I would believe equally loud sounds at one place would fade equally with the same distance added.
So my question, why am I wrong (why isn't it like this in reality)?
Please forgive me for my explanatory problems as English is not my native language.