Did you participate in the workshop in Ingolstadt? It was amazing to receive some input from Ariane about the voice. I believe that either you want to lead or just give speeches you need to constantly improve

The three biggest learning for me were

–             The voice is a tool which needs constant practice

–             Before you use more volume use a clearer voice

–             A bit of work can achieve massive results and make the difference

If you have the opportunity, I highly suggest you attend a workshop about these individual elements about a speech. It will be very insightful.