The course provides an introduction of respiratory and dermal physiology, and detailed review of removal mechanisms of aerosols and organic vapors, and chemical resistance performance of various types of chemical protective clothing and gloves. The most effective way to prevent occupational noise-induced hearing loss is through effective implementation of engineering noise controls. The course will also describe the different levels that noise control strategies may act on. Some demonstrations allow comparing initial and improved noise situations. The course will discuss basic topics in engineering economy analysis used in evaluating economic feasibility of investment projects.