在水饱和多孔固体中,用超声波型转换技术观测到了第二体积压缩波。这种多孔固体由烧结的玻璃小球组成。在孔隙度为18.5%的样品中,测得第二压缩波速度为1040m/s。预言两种体积压缩波存在于多孔介质中的 Biot 理论,对这个观测结果提供了定性解释。就作者所知,这种体波还未曾在超声频段观察到。 In water-saturated porous solids, a second volumetric compression wave was observed using ultrasound-based conversion techniques. This porous solid consists of sintered glass beads. In a sample with a porosity of 18.5%, the second compressional wave velocity was measured at 1040 m / s. The Biot theory, which predicts the existence of two volumetric compressional waves in porous media, provides a qualitative explanation for this observation. To the author’s knowledge, this body wave has not been observed in the ultrasound band.