If the LSh value is very high (untuned case) and so can
be neglected, expression (1) would be valid and simple
linear expressions for VT can be deduced [7]. This
hypothesis is not very often fulfilled because, in order
to improve the sensitivity of NDE probes, they are
usually loaded with an inductor, of rather low value [8].
Under these last working conditions, both impulsive responses IrCH , IrSS may not be linearly defined.