Sonic speed is the ability to move one's body as fast as sound waves can travel.
- Michael Cassidy possesses this ability naturally.
- Jessica Sky Petrelli has mimicked the ability.
- Robert Max has also mimicked the ability.
- Peter Petrelli has gained the ability in World 8.
- A future clone of Braedon Gray will have this ability.
Michael is able to run and move as fast as sound. He can move at the speed of sound as his ability allows him to create a sonic boom when travelling, but he cannot pass on the ability to others and take them with him at this speed. Enhanced speed is both faster and can be used to carry passengers. Also, this ability does not give immunity to being frozen in time, and it cannot advance to time travel when augmented.
Jess can overcome every limitation this ability has by using enhanced speed instead, since she has also absorbed that ability.
Robert has the same limits as his niece, Jess.
Peter also has the same limits as Jess.
Future Clone Of Braedon Gray
The clone was shown moving at the speed of sound whilst fixing his car's engine.
- Enhanced speed is the ability to move at a superhuman speed
- Peak physical properties includes an enhanced speed
- Speed manipulation can also make one faster
- A faster speed is a side effect of both permanent precognition and accelerated probability
- Acceleration field production can be used to increase speed
- Celerity is the ability to augment one's own speed to varying degrees