Voiced consonant

In phonetics, a voiced consonant is a consonant which is pronounced with the vibration of the vocal cords. For example, the sound [] is a voiced consonant (specifically a sibilant), while [] is not, and it is called a voiceless consonant. You can feel when your vocal cords are vibrating by putting your finger at your larynx, or the Adam's apple.
Here are some examples of voiced and voiceless consonant pairs in English:
Many languages have pairs of consonants like these.