In 1992 which act was passed requiring the FAA to study the social, economic, and health effects of airport noise at the 65, 60, and 55 dB DNL areas to determine the actual level at which noise creates an adverse impact on populations?

• A. The Airport and Airway Safety, Capacity, Noise Improvement, and Intermodal Transportation Act
• B. The Aviation Noise Reduction Act
• C. The Federal Airport Resilience Act
• D. The Environmental Noise Control Act

Answer: (A)

The concept here is how policy determines when airport noise becomes a real problem for people and communities by studying its social, economic, and health effects at specific exposure levels. In 1992, the act that directed the FAA to undertake this study at the 65, 60, and 55 dB DNL contours to pinpoint the actual adverse impact threshold is the Airport and Airway Safety, Capacity, Noise Improvement, and Intermodal Transportation Act. This legislation ties the measurement of noise exposure (in DNL terms) directly to impacts on populations and sets up a process for evaluating where mitigation is needed.

This choice is the best fit because it explicitly empowers the FAA to examine how noise at those levels affects people and communities, informing decisions about noise compatibility and mitigation around airports. The other acts address different goals—such as general noise reduction efforts or resilience—without this specific mandate to study adverse impacts at those DNL levels.