especially the ones used in the Environmental Control and Life Support System ventilation systems, that are the loudest. How ...

An air pollution control system is a specialized dust control system for the asphalt, cement, food, grain, mining, and timber industries. An air ventilation system cycles fresh air through a building.

Since the earliest days of human spaceflight, there has been noise from the Environmental Control and Life Support System ventilation. NASA is working to design highly efficient and quiet fans by ...