Lwa to dB(A)

sgel

I am trying to convert Lwa to dB(A) and am having a hard time finding some resources.

Attached is a picture but essentially I am trying to understand the db(A) level of air leaving ventilation duct.



I have some air volume numbers and a Lwa estimation, I am trying to figure out what these infact would be in dB(A) @ 1m away.

Any one have advice?