These assumptions are quite restrictive and their validity is difficult to ascertain. Subsequently, Ma and Igor (2005) put forward the concept of Zoeppritz Elastic Impedance which is based on Zoeppritz equation and so is exact and accurate.

• 随后Ma和Igor(2005)利用准确的佐普里兹公式提出了佐普里兹弹性阻抗(Zoeppritz Elastic Impedance)的概念,这种阻抗不加任何近似,非常准确。