About the experimental data used for fitting, we must further consider that the raw signals have been processed by instrumentation and related software, before being proposed to the user as raw data for further processing. As previously told, the "transfer function" exists. We can guess it is negligible, but it could be not so. Tennyson and coworkers are stressing that the Voigt profile has "well-documented inadequacies" (no references are given, and inadequacies not mentioned at all). We can find told that HT profile "can be computed in a straightforward and rapid manner, and reduces to simpler profiles, including the Voigt profile, under certain simplifying assumptions".