It will allow you to see what you do not hear. The blue line shows you the vibration of the vocal cords. Click on the figures.

sue /ˈsuː/

zoo /ˈzuː/

thigh /ˈθaɪ/

thy /ˈðaɪ/

batch /ˈbæʧ/

badge /ˈbæʤ/