Calum Geary, who is deaf, and his twin brother Donnacha, who has regular hearing. Their father Andrew says Calum has benefited hugely from having an  interpreter in his class since last year. Photograph: Daragh McSweeney/Provision

Soon after Calum Geary was born, doctors realised there was a problem: he didn’t have the vital auditory nerves that transmit sound information from h(...)

Shirley Higgins, conductor of St Mary’s signing choir, and members of the choir rehearsing at the school in Cabra. Photograph: Alan Betson

It’s often assumed that when profoundly deaf children are involved in any kind of musical performance it’s mainly for their therapeutic benefit: a (...)