Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. Neuroprotection is induced by activation of neural growth hormone receptors, primarily using medicaments comprising growth hormone, growth hormone analogs or ligands which are functionally equivalent. Furthermore, each transducer buzzer is positioned in the branch in such a way that the piezoelectric membrane is totally isolated from the external environment, and that the transmission elements form a contact interface with the teeth at the bite tab.