Gate information such as boarding calls, changes or delays will be relayed straight into hearing aids Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice An airport in Germany is the first in the world to relay gate information straight into travellers’ hearing aids.