Make yourself heard
Volume is probably the most important thing during a speech.
If the volume of your speech is too low the audience won’t hear what you have to say. If your volume is too hign the audience will cover their ears and start walking.
If you aren’t sure about the correct volume of your speech ask the audience.
Along with your volume, you should have in mind the delivery rate of your speech.
Nervous and anxious speakers tend to speak faster. Try to speak slowly and clearly and the audience will understand every word.
You don’t want to make them feel uncomfortable.