Deskins W G, Winter D C, Sheng H P, Garza C
J Biomech Eng. 1985 Nov;107(4):304-8. doi: 10.1115/1.3138560.
An acoustic plethysmograph intended to measure the body volume of premature infants has been developed using the principle of the Helmholtz resonator, in which the resonance frequency is dependent on the volume of the resonating cavity. A prototype system was built and used to measure the volume of inanimate objects and newborn miniature pigs. Results for inanimate objects agree within 1 percent with comparable measurements by water displacement. Results of the animal body volume measurements compare favorably (within an average of 1.1 percent) with those obtained using hydrostatic weighing.
一种旨在测量早产儿身体体积的声学体积描记器已利用亥姆霍兹共振器原理开发出来，其中共振频率取决于共振腔的体积。构建了一个原型系统并用于测量无生命物体和新生小型猪的体积。无生命物体的测量结果与通过排水法进行的可比测量结果相符，误差在1%以内。动物身体体积测量结果与使用静水称重法获得的结果相比具有优势（平均误差在1.1%以内）。
