Jonothon "Jono" Evan Starsmore, better known as Chamber or Decibel, is a fictional character, a Marvel Comics superhero associated with the X-Men and the New Warriors.
A British mutant, Jono possessed the ability to cast energy blasts from his chest. He had limited control of his power and destroyed much of his chest and lower face when his powers emerged. Recently, he lost his powers on 'M Day' and now uses technology to give himself sonic based abilities.
Jono was a member of the X-Men's junior team Generation X, although he was sullen and moody and had difficulty bonding with teammates. He has since been offered a permanent position in the X-Men's teaching staff.