Library filer dated 29/03/2005 of an office worker using a telephone. Unions are launching a campaign Tuesday January 3, 2006, to encourage the UK’s 28 million workers to check their hearing. On the day when most employees return to work after the Christmas break, the TUC is giving its backing to the Royal National Institute for the Deaf’s Breaking the Sound Barrier initiative, which uses a simple telephone test to tell people concerned about their hearing whether they should seek help. See PA Story INDUSTRY Hearing. PRESS ASSOCIATION Photo. Photo credit should read: PA