I talk a lot about RESONANCE when i teach my students how to develop a  British accent. Here's the challenge, initially you need to work the muscles in the mouth to access the spaces that you're not used to using. Once you have become more aware of the cavities in the back of your mouth and throat and the muscles in your lower jaw, your voice will naturally start to resonate further back in these cavities. It's not something that you can force. Being relaxed is really important, as tension can stop the voice from resonating fully.

I recommend a series of exercises. It is best to practice them all. However, some people focus more on some than others according to their specific needs. When i teach my students, i constantly vary my approach in order to fulfil different learning styles and needs.

During my recent Facebook Live, i talked a lot about resonance. watching this video is a good place to start if you are interested in this topic:

Here are just a few of my recommendations. 

1. Follow my warm up exercises (visit my YouTube channel for further details): https://www.youtube.com/user/pvfran