Concepts of Voiced and Unvoiced Sounds

In phonetics, sounds can be classified into two main categories based on the vibration of the vocal cords during their production: voiced sounds and unvoiced sounds. This distinction is key to understanding how sounds are produced and perceived in different languages.

1. Voiced Sounds

A voiced sound is produced when the vocal cords vibrate as air passes through the trachea and larynx. These sounds have a vibrating quality because the vocal cords are touching or moving toward each other, creating a vibration.

Examples of voiced sounds:

• /b/ as in bat
• /d/ as in dog
• /g/ as in goat
• /z/ as in zebra
• /ʒ/ as in measure
• /v/ as in van

Key Features:

• The vocal cords vibrate when producing these sounds.
• You can feel the vibrations in your throat when you say them.

2. Unvoiced Sounds

A voiceless sound is produced when the vocal cords do not vibrate, allowing air to flow freely through the mouth without any contact or vibration of the vocal cords.

Examples of voiceless sounds:

• /p/ as in pat
• /t/ as in top
• /k/ as in cat
• /s/ as in sun
• /f/ ​​as in fan
• /ʃ/ as in she

Main characteristics:

• The vocal cords do not vibrate during the production of these sounds.
• Fewer vibrations can be felt in the throat when pronouncing them.

How do you tell a voiced sound from a voiceless sound?

You can put your hand on their throat while they say a pair of sounds, one voiced and one voiceless. When you do this, they will feel a difference in the vibration.

• Voiced sound (e.g. /b/): vibrations are felt in the throat.
• Voiceless sound (e.g. /p/): no vibrations are felt.