Voiced and Voiceless Consonant Pairs

Many consonants come in pairs of voiced and voiceless pronunciation. Some  examples include  d/t,  v/f,  and b/p.

The only difference between the two consonant is that one has a vibration of the vocal chords (voiced) and one does not (voiceless). Other than that,  the tongue, lips, or teeth placement and air flow for the two consonants are the same.

When a vowel is before a voiced consonant, the sound will be held longer.

When a vowel is before a voiceless consonant, the sound will be shorter.

w-i-i-i-de  building white  building
Voiced Voiceless
The wide building is the white building wide white
I need room in the neat room need neat
The robe is made of rope robe rope
The first prize is for the first price prize price
Save water that is safe water save safe