摘要
用有限振幅插入取代法研究非线性声参量B/A,对于耗散媒介应计及样品的声衰减,本文在考虑了样品的声衰减和换能器的衍射对测量的影响后推导了非线性参量的修正公式。利用此公式研究了生物样品包括生物流体和动物软组织的B/A值及其与浓度和样品结构的依赖关系。
Tne acoustic nonlinearity parameter B/A is measured by using finite amplitude insert-substitution method. For lossy media the sound attenuation of samples must be acounted for in the determination of nonlinearity parameter B/A. Considering the influence of both sound attenuation and diffraction of the transducer on the experimental measurement, a modified formula for B/A values is derived in this paper. On the basis of this formula, the B/T values and its dependence on the concentration and the structure of biological samples, including biological solutions and soft tissues, have been studied.
出处
《声学学报》
EI
CSCD
北大核心
1989年第2期103-109,共7页
Acta Acustica
