[2] While attending Salesian College secondary school in Celbridge, Co Kildare, Noonan met Damien Rice, Dominic Phillips and Brian Crosby.

[6] Releasing seven studio albums (three of them chart-toppers) and two live compilations over a twenty-year career, Bell X1 is regarded as one of the most successful Irish rock acts of all time and national treasures in their native Ireland.

The group is also credited with releasing some of the most enduring rock singles on the Irish airwaves, such as "The Great Defector", "Rocky Took a Lover", "Flame", "Eve, the Apple of My Eye" and "Alphabet Soup".

In May 2014, a self-titled debut album was released featuring collaborations with Joan As Policewoman, Martha Wainwright, Gemma Hayes, Amy Millan, Julia Stone, Lisa Hannigan, Danielle Harrison, Cathy Davey, Maria Doyle Kennedy and fiddler Caoimhín Ó Raghallaigh.

In May 2014, Noonan joined many of the female singers who featured on Printer Clips debut album at the National Concert Hall, Dublin for a special live performance of the project.

[15] The multi-media project featured new original material by artists such as James Vincent McMorrow, Cathy Davey, Duke Special, Gemma Hayes, Jape, Colm Mac Con Iomaire, Lisa O'Neill, Declan O'Rourke, John Sheahan (The Dubliners), Paul Cleary (The Blades) and novelist Caitriona Lally.

Among the acts confirmed were Lisa Hannigan, Saint Sister, Maria Kelly, Brian Deady, Seamus Fogarty, Loah, poet Stephen James Smith and Mango & Mathman.

[16] In July 2018, electronic artist Daithí released a new track entitled "Take The Wheel" featuring Noonan on lead vocals, with Hot Press describing the song as "hauntingly hopeful".

[18] In spring 2018, it was revealed that Noonan would be releasing Push Puppet, a debut solo EP under his own name produced by Thomas Bartlett and comprising the tracks "Microfiche", "Moth To Your Flame", "Venetian Blinds" and "The Flood".

Noonan has said that the material was largely structured over R&B and Hip-Hop grooves created using a phone app called Funk Box, with less emphasis on semantic lyrical meaning than the sound and rhythm of the words.

The couple released a charity single in 2014 called "Hole in Her Heart", inspired by their daughter Aislinn whom it was discovered had an atrial septal defect while undergoing treatment for an intestinal infection.