Nourrit was an intelligent and cultured singer. He possessed a mellow and powerful vocal timbre during his prime and was a master of the head voice. His range extended up to E5, although he never went higher than D5 in public. He sang during a turning-point in French operatic vocalism, when performers began using a rounder, more open-throated and Italianate method of voice production than hitherto had been the case, with less resort to falsetto by tenors. Indeed, the scores of the musical passages written for Nourrit by Rossini, Giacomo Meyerbeer and others, contain orchestral markings which indicate that he could not have been singing in falsetto in his upper register. This was a departure from the practice of earlier male operatic interpreters.