[en] This work presents and comments two experimental techniques used at the L.F.E.N. to study some resonances in the ²⁷Al + p reaction. One of them - the energy modulating device - is a comfortable and accurate alternative to the conventional step by step method of measuring resonance yield curves; the other one is a process to resolve decay schemes of closely spaced, overlapped doublet resonances. The general principles of these two techniques are discussed, the computer programme developed in association with them are presented and some results are commented