Pitch Range produced by Vocal Cords (IMAGE) PLOS Caption Vocal cords are able to produce a wide range of sound frequencies because of the larynx's ability to stretch vocal cords and the cords' molecular composition -- according to a new paper published in PLOS Computational Biology. Credit Illustration by Lisa A. Clark, MA, CMI, based on original art concept by Kanako Omichi and Tobias Riede. Usage Restrictions Copyright 2016 Ingo R. Titze, Tobias Riede, and Ted Mau. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.