Refers to the ability to increase the loudness of the voice. An individual may be either apparently or due to physical limitation unable to add loudness because of [intlink id=”641″ type=”post”]vocal fold paralysis[/intlink], a [intlink id=”373″ type=”post”]nonorganic[/intlink] disorder, or vocal fold [intlink id=”633″ type=”post”]bowing[/intlink] – although the [intlink id=”424″ type=”post”]phenomenology[/intlink] observed when three individuals representing these three diagnoses try to add loudness differs markedly.