On the surface air exchange is a fairly simple concept. Taking the air inside your home and replacing it (or exchanging it) with fresh outdoor air.
A trend in the building industry is towards Net Zero homes. The goal of a Net Zero home is to be able to provide all the energy needed for the home without using outside sources.
We are constantly surrounded by sound. It is all around us. We also have ways to measure sounds. Some people might be familiar with the term Sones.