Tk. Stanton et Kg. Foote, A GENERALIZED TARGET STRENGTH MODEL FOR EUPHAUSIIDS, WITH APPLICATIONS TO OTHER ZOOPLANKTON - COMMENTS, The Journal of the Acoustical Society of America, 98(3), 1995, pp. 1807-1809
A major premise upon which this paper by Macaulay was written is flawe
d as is the formulation (both conceptually and mathematically) of the
scattering models. The formulation is actually an assemblage and adapt
ation of previously published approximate solutions rather than a gene
ralization. The physics of the scattering is blurred through a multitu
de of empirical parameters. In order for this new ''generalized'' mode
l to fit the data, the animals are required to change shape as the aco
ustic frequency changes (for any animal of fixed size, it is required
to be a sphere at low frequencies, prolate spheroid at intermediate fr
equencies, and bent cylinder at high frequencies). The scattering mode
ls, as presented, are not only physically incorrect, but in two cases
are not even dimensionally correct (terms that are dimensionless are a
dded to terms of dimension area). These and other errors are listed in
several categories and commented upon with references given. (C) 1995
Acoustical Society of America.