Last year the World Health Organisation stated that an estimated 1 billion young people are at risk of hearing loss, thanks to the way we listen to music. But that may soon be reversible, as new studies suggest we're nearing the possibility of regrowing inner-ear hair cells.

Dutch company Audion Therapeutics will soon begin human trials on a drug that has successfully regrown hair cells in mice in 2013 after a 'notch inhibitor' used to treat dementia was linked to treating deafness. "We thought, these side effects in an Alzheimer's patient are exactly what we’re looking for in treating deafness," Audion's Dr. Albert Edge said. "So we decided to try that idea out in these mice."

The European Union's Horizon 2020 fund has funded the company, who are currently working with pharmaceutical company Eli Lilly to develop a new compound.