Sound visualisation is the ability to see and visualise sound waves as colour and light.
- Michael Cassidy has this ability naturally.
- Paul Cooper will also have this ability naturally.
- Jessica Sky Petrelli has absorbed the ability.
- Robert Max has also absorbed the ability.
- Peter Petrelli has absorbed the ability.
The ability is passive and works constantly, allowing those who possess it to see sound as colour and light all of the time. The colours vary according to pitch, amplitude and volume. The ability can be used to identify where sound is coming from if one's hearing was impaired.