My sister and I have problem in pronunciation of voiced and unvoiced
Th. We used to substitute unvoiced
th with \s\ (like in think) and \t\ (like in thank you) and voice
th with \d\
Now we are trying to use the correct pronunciation. We have watched so many online tutorials (For example this one). Here is how she pronounces these sounds:
I think her pronunciation for unvoiced th is almost correct, but her pronunciation for voiced th sounds a little like zzz. Would you please listen to these pronunciations to see if they are correct?