非线性声参量B/A与媒质结构关系理论进展

The Theoretical Process of the Relation Between the Non-Linear Vocal Parameter B/A and the Medium Structure

R .Beyer提出的B/A参量体现了流体一阶弹性参量对应力的依赖关系 ,有可能成为生物组织定征的新特征参量 .解释非线性声学参量B/A的Rao流体理论定性说明了流体的非线性性质 ,但不能定量计算 .Hartmann分子势理论把B/A与分子势联系起来 ,有助于解释B/A的微观机制 ,但仍不能定量计算 .Endo热力学公式仅用热力学参数就可决定B/A ,但这些参数往往难于得到 .基于Schaffs假设的理论将液体B/A参量与其微观参量联系起来 ,并能部分定量计算 .基于改进的Flory方程的理论能定量计算 。

B/A parameter advanced by R. Beyer revealed Scale No.1 Liquid's elastic parameter's dependent reliance on stress and probably became the new-featured parameter of biological tissues orientation. The explanation of non-linear vocal parameter B/A's Rao Liquid Theory Orientation displays the non-linear nature of liquidity, but cannot be measured by quantity. Hartman's molecular formula theory relates B/A to molecular formula and contributes to the explanation of the micro mechanism, but cannot be measured by quantity, either. Endo's thermodynamical formula can determine B/A only by thermodynamical parameter, but these parameters are difficult to attain. Schaffs's supposed theory relates liquid B/A parameter with its micro parameter and thus partial counting can be conducted by quantity. The theory based on Flory's equation can count by quantity and as a result it gains more access to reality.