Robert F. Kennedy Jr.'s distinctive speaking style is influenced by several factors. Most notably, he has a neurological condition called spasmodic dysphonia, which causes involuntary spasms in the muscles controlling his vocal cords, leading to a quivering, raspy voice. This condition affects the quality and texture of his speech, making it sound unique and sometimes strained. He has received treatments like Botox injections to manage the condition but it still shapes how his voice sounds.

Beyond the physical aspect, RFK Jr.'s speech style includes a measured pace with strategic pauses, which allows him to emphasize key points and give listeners time to absorb his message. He uses variation in pitch and intonation to convey emotion and emphasize important words, which enhances the authenticity and emotional connection of his communication. His voice carries a gravelly, raspy texture that adds a sense of experience and sincerity. He is skilled in using storytelling and rhetorical techniques such as repetition, ethos, pathos, and logos to make his speeches engaging and memorable.

In summary, RFK Jr.'s speaking style is a combination of his medical condition that affects his voice quality and his deliberate rhetorical skills that shape his emotional and persuasive delivery. This combination gives his speeches authenticity, emotional depth, and memorability.