If there were no friction, you wouldn't be able to hear anything.
No for the first two; yes for the third - As Poole said.- Does the velum touch
esthe back wall of the pharynx when we pronounce [b], [d] and [g]?If you say 'agagagagag....you will feel the contact being made and broken.How come? Because I cannot feel that the soft palate of the alveolar ridge touches the the back wall of the pharynx.
Student or Learner