Deskins W G, Winter D C, Sheng H P, Garza C
J Acoust Soc Am. 1985 Feb;77(2):756-8. doi: 10.1121/1.392346.
A technique to estimate the body volume of newborns has been developed using the principle of the Helmholtz resonator. The change in the resonance frequency of a small cavity after an infant is placed inside can be used to determine the body volume of the infant. A prototype system, termed an acoustic plethysmograph, was built and used to measure the volume of newborn miniature pigs. Results of the animal body volume measurements compare favorably (within an average of 1.1%) with body volumes measured by hydrostatic weighing.
一种利用亥姆霍兹共鸣器原理估算新生儿身体体积的技术已经开发出来。将婴儿放入一个小腔内后，该小腔共振频率的变化可用于确定婴儿的身体体积。构建了一个称为声学体积描记器的原型系统，并用于测量新生小型猪的体积。动物身体体积测量结果与静水称重法测量的身体体积相比非常有利（平均误差在1.1%以内）。
