"The vocal fold vibrations modulate the air pressure and produce a periodic sound. The produced sounds, when the vocal folds are vibrating, are called “voiced sounds,” while those in which the vocal folds do not vibrate are called “unvoiced sounds.” The air passages above the larynx are called the “vocal tract.” ..." – By Isao Tokuda
"This section examines in detail some recent developments in the pronunciation of the French of France, based to some extent on studies adopting a number-crunching or variationist viewpoint. Subsequent sections consider the varieties of French spoken in Belgium and Switzerland; we may note in passing the seeming gap in the literature on Luxembourg French. ..." – By Nigel Armstrong
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