Not very vocal with my first birth until towards transition when I did some complaining. Was a drug free homebirth
Also screamed with my episiotomy because they couldn't use local.
Second birth was under and hour from first pain to pushing her out in the ambulance also drug free. I was literally smashed with contractions one on top of the other from the get go. So so vocal I couldn't stop it it really helped me do something with the intensity of being strapped down to an ambulance bed and in hard labour. I sounded like Tibetan monk prayer or something! So deep and rhythmic about 3-4 long " orrrrrrrrrrr" sounds per contraction and changing pitch each time ahah. Then I did a few grunts at the end of one of them and next contraction head on view.
Was silent birthing her head as I was concentrating on slowing down to avoid tearing.