This condition is known as unilateral abductor paralysis, and is accompanied by interference with inspiration and phonation.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
In those who survive, the voice has a peculiar nasal twang, as in phonation the air is expelled through the nose instead of through the mouth, and the articulation, especially of certain consonants, is very indistinct.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
If the vocal cords are observed by means of the laryngoscope during phonation, no change is seen, owing to the rapidity of the vibrations, although a scale of an octave may be sung; in the lower notes, however, the vocal cords are seen not so closely approximated as in the very high notes.
"The Brain and the Voice in Speech and Song"
F. W. Mott