Jerry W. Schweiker
Philip J. Wentz
Robert Taylor
Eng. Dynam. Intl., 8420 Delmar Blvd., Ste. 303, St. Louis, MO 63124-2186
Since 1986 a school acoustical treatment has been funded by Airport Community Programs Office (ACPO), St. Louis International Airport. The program has included selection of candidate schools, inside--outside noise tests, providing acoustical treatment recommendations, construction, and the postconstruction testing of elementary schools within the environs of St. Louis International Airport (Lambert Field). This paper summarizes the results of the first eight schools. Three schools remain in the program and await funding for the construction phase. Although the instrumentation and the type of noise tests has varied somewhat over the years, the primary goal was to reduce the classroom noise to below the L[sub eq] 45 level per FAA guidelines. SEL and 1/3-oct band data from overflights were also evaluated in some schools. The improvement in classroom L[sub eq] varied from 8 to 15.7 dBA in the classrooms tested. The acoustical improvements specified included acoustic windows and doors, interior acoustical treatment, new roofing, and air conditioning. The cost of construction varied from $253 000 to $500 000 per school.