C Sharp Board

• Men and women have discrepant phonic folds sizes; adult male voices are unusually lower-pitched and have imposing folds

• The male vocal folds Voice Lessons (which would be measured vertically in the opposite diagram), are between 17 mm and 25 mm in length. The female sung folds are between 12.5 mm and 17.5 mm in length.

As seen in the illustration, the folds are located just above the trachea (the windpipe which travels from the lungs). Food and drink do not cut through the cords but instead pass through the esophagus, an unlinked tube. Both tubes are separated by the epiglottis, a "flap" that covers the opening of the trachea while swallowing.