As a student of vocal singing, I've had trouble developing a full resonant sound, especially across my entire range. On accident I had my guitar hole placed near my head and I noticed in a particular range(the range that is most relaxing for me) my voice resonated within the guitar chamber.
When I create this resonating sound within the guitar that is far more noticeable than say speaking, is that a sign that I'm moving towards a full resonant sound? Can I rely on this as a tool to help me gauge how well my resonance is? Or am I wrong on this matter?