I am 29 and have a covert stammer. I also have a very high pitched voice. Do you think if I can change my way of speaking and speak deeper this will also help my stammer?
I don’t know that the pitch and the stammer are related. I also would not rule it out. Whether there is a relationship between the two or not, vocal work can certainly help both. I have addressed how to lower the pitch of the voice in answers to other questions and I encourage you to try those suggestions. To reduce the stammer, I recommend working with a speech therapist and focusing especially on the breath. You might also work very briefly and in a very focused way with a therapist to investigate any relationship between emotions, the stammer and past experience. If you can get recommendations for these specialists from a doctor, your insurance may cover the cost of both therapists.