Response to “Analysis and comparison of recent resonance scattering formulations by M. S. Choi et al. with earlier, traditional RST work” [J. Acoust. Soc. Am. 104 , 1720 (1998)]

In the letter by Gaunaurd, there were some comments on recent resonance scattering formulations by the author and his colleagues. Replies to the comments are made here. To clarify the discussion, brief reviews on the recent formulations and more traditional ones are included. It is shown that the recent approaches are based on much more robust physical concepts and approximations than the traditional ones, so that they are sufficient to be presented as novel tools for target identification purposes.