Dear Debasish Mahapatra ,

Please refer to the following research article:

Article Plane Wave Admittance Method - a novel approach for determin...

Respected Dr.Shuraik Kader Sir

Thank You Sir for responding to the Question and providing reference material.

The researcher should distinguish between two values, through a controlled sample, which guide them, and be according to the scientific basis of the calculations of time lag, which do not conflict with the values derived by the researcher.