“Vocal cords only can be found in humans. Animals do not have it. Vocal cords are given by God so that humans can communicate God’s ‘logos’ (truth).”
(“Wen Ti Jie Ta” CD -14 Aug 2005, translator: Yang Tuck Meng, track 11)
Rev. Dr. Stephen Tong is wrong about vocal cords. Almost all animals have vocal cords. They are just different in the position, size, and hence functions. There are animals that have the same vocal cords as humans. In fact, human infants share the same vocal cords with apes. See this article from McGill University's website.
W. Tecumseh Fitch, Lecturer in Psychology at University of St. Andrews, whose major research is on evolution and neural basis of cognition and communication, has pointed out that vocal cords that are similar with humans’ are found in animal like the red deer (Cervus elaphus).
David Reby, Lecturer in Psychology at University of Sussex, on the red deer's vocal cords discovery: http://www.lifesci.sussex.ac.uk/cmvcr/Deer.html