343 In 1954, Wooldridge attempted to isolate the contribution of the nasal passages to the singing voice by comparing the vowels produced by six professional singers under two conditions: normal, and with the nasal passages filled with ...
References
^ William Vennard (1967). Singing: the mechanism and the technic, Carl Fischer. ISBN 9780825800559 (revised Sep 2015)^ William Vennard (1967). Singing: the mechanism and the technic, Carl Fischer. ISBN 9780825800559 (revised Aug 2013)^ William VennardSinging: The Mechanism and the Technic, Carl Fischer. Amazon. ISBN 9780825800559 (revised Feb 2015)
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