本文係探討如何將水中波壓轉換為水面波浪，本文利用實驗數據資料，提出一壓力轉換函數經驗式，並與線性轉換函數和邱、郭與簡（1993）提出之經驗轉換函數所求出之水位頻譜相比較，探討各種轉換函數之適用性。

　　研究結果顯示，壓力轉換函數Kp與無因次參數w^2|z|/g、w^2d/g、w^2H/g均有關係存在，而非邱、郭與簡（1993）之轉換函數與w^2d/g、w^2H/g無關。線性及邱、郭與簡（1993）之轉換函數於示性週期較短、水深較深及示性波高較大時，所求得之水位頻譜皆有低估之現象，本文之壓力轉換函數相較於兩者，較能正確推算水位頻譜，且不會因波壓計設置深度不同，所求得之水位頻譜亦有所不同。

　　The purpose of this study is to investigate how to transform the wave pressure to surface wave. Based on the experimental data, a pressure transfer function was developed. A comparison with the wave spectrum calculated by present result, linear pressure response function and Chiu et al. transfer function （1993） was carried out to evaluated the application of each transfer functions.

　　The result of the study shows that the transfer function is related to the dimensionless parameterw^2|z|/g,w^2d/g and w^2H/g. It is different with the result of Chiu et al.（1993）. The spectrum obtained by linear pressure response function and Chiu et al.（1993）is underestimated at the short significant wave period, deep water and large significant wave height. The estimation of wave spectrum using the pressure transfer function of this study is more accurate and is not influence by the depth of the gauge.

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