Sean Cassidy

Acoustikinesis: He can create powerful sonic waves with his voice with which he can achieve various effects, often with the assistance of psionic abilities which function only in unison with his sonic abilities.
 * Sonic scream: He can shatter solid objects with an incredibly loud and destructive sonic scream.
 * Flight: He has the ability to fly at sub-sonic speeds by using his voice to propel him through the air and ride via sound waves.
 * Sonar: He can use his sonic powers as a form of sonar. By sending out a precise and pure note and listening to the returning, altered wave-front of the note, he can evaluate his surroundings in total darkness with varying degrees of resolution.
 * Sonic shields: He can tighten sound waves around himself or others near him, creating a barrier against outside attack.
 * Vocal disorientation:  He has the ability to change someone's balance by affecting their equilibrium via his sonic scream.
 * Vocal trance: He has the ability to subtly influence a person's subconscious mind by changing the tones and vibrations of his voice using hypersonic suggestions.
 * Vocal unconsciousness: He has the ability to affect the fluid in a person's ear, causing the person to fall unconscious.
 * Sound immunity: Cassidy's hearing and equilibrium are unaffected by his hypersonic abilities or other/similar sound-based abilities.
 * Superhuman vocal stamina: He possesses superhuman stamina in his lungs, throat, and vocal cords.