Pronunciation when words ending with-ED
Unvoiced
Words ending with-ed, pronounced /t/ after a Word is unvoiced (No vocal cords vibrate) which can be tested by uttering the air out through your mouth. Without a sound coming out from the neck of the unvoiced such as /k/, /p/, /s/, /ch/, /sh/
Voiced
Words ending with-ed, pronounced /d/ after a Word is voiced (Sound of shaking while emitting sounds) Can test with voiced out of the neck. you will find that there are sound vibration box.