The highest tone that can ordinarily be heard is the E[flat] four octaves higher than the highest E[flat] of the piano.
The first of these overtones is the octave above the fundamental; the second is the fifth above this octave; the third, two octaves above the fundamental, and so on through the series as shown in the figure below.
Here, in imitation of Malibran, she modified the original phrase of Bellini, so as to let her voice descend to the tenor G, when, by a rapid transition, she struck the G above the treble stave, springing over an interval of two octaves.
Her voice embraced three complete octaves, extending from the contralto D to the D upper soprano, and, though sufficiently powerful to have filled the San Carlos, executed, with the minutest precision, every difficulty of vocal composition-ascending and descending scales, cadences, or fiorituri.