We spend 90% of our lives indoors Yes, people spend 90% of their lives indoors, which means their health and productivity depend largely on the conditions provided in that closed space. Naturally, the healthier the environment, the more productive people become, because they can focus all their energy on their tasks. The most important factors that influence people’s health are noise, temperature and air quality.   Noise Noise can be directly managed indoors but noise coming from outside is usually beyond our control. The sounds of traffic, maintenance and construction works, nearby gathering places where people meet to talk…