The following deep voice exercise will help you create a deeper voice. You will need to do these exercises day and night, 4-5 days a week for at least a month.
1) Tilt your head back as far as you can.
2) Recite the following sentence “Bing, Bong. Ding, Dong. King Kong.” slowly, stretching and elongating the “ng” sound each time.
3) Repeat step 2 but using a deeper pitch
4) Repeat step 2 again using your deepest pitch
For results, you will need to do 1 x 30 min session in the day/afternoon and night before sleeping.
Please try to be consistent and do this for 4-5 days a week, and if you can keep this up for a month, report back with your results.