@askvinh: Do you struggle to speak louder? Personally I've struggled with this, and I used to speak with my voice in my throat. So no matter how loud I tried to project my voice, it was limited by me not understanding voice placement. My vocal coach taught me this powerful lesson, to start becoming aware of trying to feel the vibrations on your lips and face when you speak. This is how you know your voice is being placed in the most optimal position for you to be able to project your volume better. Try these 2 exercises and let me know if it helped!