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.