“…That is why, in our opinion, vocal intensity characteristics, as objectively measured by phonetography, can open a new era of voice research. The eye-catching dip(s) in the phonetogram at certain frequencies illustrate the different mechanisms based on the prephonatory larynx positions and specific muscle activities [20,24,25]. A recent study [22] showed that the region of voice instabilities, which can be spread over an octave (see our specific methodology), is accompanied by SPL variations of up to 15 dB, even in classically trained singers, trying to avoid pitch breaks or jumps.…”