(jɔːn)
noun
The act of opening the mouth widely, whilst taking a deep inhalation of breath, often as an involuntary reaction to tiredness, sleepiness or boredom. It has frequently been used as an exercise in singing & is associated with ‘opening the throat’ for in order to aquire more pharyngeal space (however it can also induce tracheal pull which is counter to effective vocal production).
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