Sound in air travels down the EAM to the TyMe which vibrates. The vibrations are amplified the the chain of inner ear bones the malleus (Mal) http://pharyngula.org/index/weblog/comments/evolution_of_the_whale_ear/
How air travels Ductless Mini-Split Windowless and ductless Ductwork & Distribution Air volume & velocity Efficiencies What EER & AFUE mean. http://www.warmair.com/