I researched a lot about voice. A lot of times I need to repeat myself to my friends so they can hear me, because they didn't the first time. When I tell a joke, nobody laughs, 3 seconds later someone else tells the same joke as me and everyone is laughing.

This got me to the point where I researched about voice exercises, how to have a more powerful voice, deep voice, how to make people to listen etc. Now, I cannot understand one thing.

Deep vs powerful voice. First time, I had some success, I deepen my voice and people were more alert and responded a lot quicker than before. But some people told me "Why do you force yourself to talk like that?". After this I was thinking maybe just speak from your diaphragm, speak louder, without a nasal voice. Without actually deepening my voice.

Can you clarify this for me? Which one should I go for?

Also I think I need to say that when I used my deep voice, I was also very quiet, but people still listened.