A deaf-mute girl, on a horse that she had ridden for THREE weeks!! not to mention the song she picked out to dedicate to her deceased father! Listen to the announcer's voice crack!
The horse she is riding is not even hers; she is training it for a client and has had it only 20 days at the time of the ride shown here. Note that she rides without a saddle or halter and bit and (obviously) without voice commands.
She is using the method used by American Indians. When you think your voice can't be heard I want each of you to watch this Video.
She has no voice. She cannot hear. Yet she has persevered and achieved VICTORY!