The results from the tests conducted at two sound insulation program sites showed that there has been less deterioration in performance over the years than expected. This effort followed with actual acoustical testing and architectural evaluations of representative sample of dwelling units that were insulated in the early years.
The plan was to use the chronology to identify changes in methods and procedures from early to current programs, and relate these changes to possible degradation in acoustic performance. In Phase I, a literature search was conducted to develop the chronology of airport sound insulation programs and provide leads to the identification of sources of data. The project consisted of ten tasks conducted in two phases. Predict the performance of current procedures and provide guidance to help airports determine the expectation of the durability and performance of current sound insulation techniques, treatment and materials. Identify and evaluate the degree and causes of deterioration, and what changes have been made in current programs that reduce the likelihood of deterioration, and 2. Accordingly, the objectives of the research were as follows: The objectives of Airport Cooperative Research Program (ACRP) Project 02-31 are as follows: 1.
Although no exhaustive studies have been performed, there have been reports that the acoustical performance of treatments applied in early programs might have deteriorated over time. This research funded by the Airport Cooperative Research Program of the National Academy of Science is in response to a concern as to whether the acoustic performance achieved in early airport sound insulation programs has met the test of time and still provides the same protection as when it was first introduced.
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