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.
Over Four Million Ukrainian Refugees Have Fled War – UN channelstv.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from channelstv.com Daily Mail and Mail on Sunday newspapers.
Thousands of largely Russian protesters rallied against President Vladimir Putin in central Prague on Saturday, calling on him to stop the war in Ukraine.