针对船舶甲板大型装备噪声测试问题,根据声学原理论述了空气-液体、固体二类界面声波反射特性,当液体或固体横波声阻抗与空气声阻抗之比大于等于2000时,声波通过空气到液体或固体界面时,至少99.80%的声能量被反射。在此基础上,对船舶甲板大型装备噪声在陆地上与在船舶甲板上声场中声压级的差异进行了分析。 According to the acoustic principle, the acoustic reflection characteristics of air-liquid and solid interface are discussed. When the ratio of the acoustic impedance of liquid or solid to the acoustic impedance of air is greater than or equal to 2000, the sound wave passes through the air to the liquid or At the solid interface, at least 99.80% of the acoustic energy is reflected. On this basis, the differences of the sound pressure level of large equipment noise on the deck of the ship and the sound field on the deck of the ship are analyzed.