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１９７５年ＡＣＲＡ－ＦＰＮ以被动声学测距方式投入运行。及至 １９８３年安装了声学发 射／接收阵之后，又开始了合置与分置情况下的声响实验。利用一个空间置换的接收 阵可以在已知环境条件下做长时间的声学实验。特别在有风暴和高海况时，已获得 了令人感兴趣的基本数据结果。例如环境噪声、混响和传播损失。后者系由考察船 来搜集数据。本文将给出对ＡＣＲＡ－ＦＰＮ的描述和对研究结果的评价。
1975 ACRA-FPN with passive acoustic ranging method put into operation. After the installation of the acoustic transmitting / receiving array in 1983, the acoustic experiment was again started with the installation and disassembly. Long-term acoustic experiments can be performed under known environmental conditions using a space-shifted receiver array. In particular, in the presence of storms and high sea conditions, interesting results of basic data have been obtained. Such as environmental noise, reverb and propagation losses. The latter by the inspection boat to collect data. This article will give a description of ACRA-FPN and evaluation of the results.