介绍了聚氨酯材料的水声特性，并重点评述了聚氨酯水声吸声材料、水声透声材料和水声反声材料的研究进展。
The underwater acoustic properties of polyurethanes were introduced. The recent research progress of underwater acoustic materials of polyurethanes was reviewed.
本文对透声复合材料及其构件的声学性能进行了研究。
The acoustic performance of SGRP composite and structure are investigated in this paper.
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