nodules video (Article)
This brief video shows a stroboscopic laryngeal exam of a female with nodules. Several pitches are produced. It is clear that the nodules prevent vocal fold vibration at a higher pitch. (posted 2:34 PM, August 27, 2014)

breathy/vascular lesion voice sample (Article)
This short audio clip is of a high school aged female singer with a vascular (blood filled) lesion of the right vocal fold. The vocal fold is also irregular, swollen and stiff, and therefore does not vibrate well. Because of the irregularity of the vibratory margin of the vocal fold, the glottis does not close completely. The definition of breathiness is turbulence noise of air escaping through the incompletely closed glottis. This can be heard in this sample. You can also hear that she runs out of breath quickly. However, the breathiness is not as severe or apparent as it is in the breathy/paralysis clip. One could think that she is simply using a breathy style in the context of the song, or that she is young and needs to "focus" or "support" the tone. In fact, however, the vocal fold is badly damaged. (posted 2:34 PM, August 27, 2014)

polyp video (Article)
This video shows a larynx with a hemorrhagic (blood filled, aka vascular) polyp on the right vocal fold. The polyp results in incomplete closure of the glottis, and irregular vibration of the vocal folds. The varies according to pitch and loudness. The video makes it clear why the singing voice quality in the audio clip varies from markedly rough to normal. (posted 2:34 PM, August 27, 2014)