The human voice, including both pitch and volume, is created here as air travels through the vocal cords, but it can change based on the position of the tongue, lips, mouth and pharynx.
20 Signs of Cancer Usually Ignored by Women msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
20 Signs of Cancer Usually Ignored by Women msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.