Change Your Voice with Science

How does the air around us impact our voices? Science Interpreters Al and Jacqui join forces to show us. Adult supervision needed.

You will find out that different gasses can have an effect on the timbre of your voice. Helium is a less dense gas, which helps the vibrations of your vocal cords to move very quickly, so they emit a high, squeaky sound. On the other hand, sulfur hexaflouride is a denser gas, which causes the vibrations of your vocal cords to move more slowly, emitting a low, deep voice.  

Related Topics: sound, biology, chemistry