polyp voice sample (Article)
This short audio clip is of an adult male with a vocal fold polyp. The polyp results in irregular vocal fold vibration that results in the perception of roughness. See also the video clip of the same lesion. (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)