The letters p and b represent bilabial consonants, respectively voiceless and voiced.
The bilabial sounds are:
p: pizza, plate, puzzle;
b: bag, big, bubble.
To pronounce bilabial consonants the flow of air is stopped or restricted by the two lips.
- p: voiceless, vocal cords do not vibrate during the articulation of the consonant;
- b: voiced, vocal cords vibrate during the articulation of the consonant.