This report fulfills the requirement of Public Law 94-353 that requires the Secretary of Transportation to report to the Congress with respect to the feasibility, practicability, and cost of soundproofing noise-impacted schools, hospitals, and public health facilities, in order to reduce the possible adverse effects of aircraft noise. A survey of the impact of aircraft noise on 60 school and hospital buildings was conducted near six major U.S. airports within Noise Exposure Forecast (NEF) areas to acquire a representative sample of aircraft noise impact on such buildings nationwide. Building modifications for noise reduction purposes were estimated for the sample of 60 buildings. Resultant noise reductions and costs provided a basis for extrapolation to all such buildings within a NEF impact area around airports nationwide. (Author/MLF)