Prior to the advent of the modern laryngoscope, the only way to visualize the larynx was through indirect techniques: the Spanish singing professor Manuel García 1805-1868 used mirrors to observe his glottis and the glottis of his students during vocalization.
Antes del advenimiento de los laringoscopios modernos, la única forma de visualizar la laringe era a través de técnicas indirectas: el instructor de canto español Manuel García 1805-1868 usaba espejos para observar su glotis y la de sus alumnos durante la vocalización.