Centenary of the Royal National Institute for Deaf People - in pictures

June 9, 1911: The national bureau for promoting the general welfare of the deaf is founded by Leo Bonn, a deaf merchant banker. It becomes the National Institute for the Deaf 13 years later. Photograph: RNID

1948: The national health service (NHS) is founded, introducing the first free hearing aids and batteries. The arrival of the free Medresco hearing aid is announced. Photograph: RNID

1958: HRH Prince Philip, the Duke of Edinburgh, becomes patron of the charity. Photograph: RNID

1961: The Queen approves the addition of 'Royal' to mark the institute's jubilee year. An advert in the same year entitled No Cymbals for Johnny shows a photograph of a small child sitting oblivious as two cymbals clash. Photograph: RNID

1974: The first NHS 'behind the ear' hearing aid for adults is introduced. For many this replaces earlier body-worn aids. Photograph: RNID

1975: The first subtitles are transmitted by Ceefax, the BBC's teletext service.
Photograph: RNID

1983: The telephone exchange for the deaf is set up, where telephone and textphone users can communicate through a third-party operator relaying voice and text communication. Photograph: RNID

1999: RNID launches its biomedical research programme to fund medical research into hearing loss and tinnitus. Photograph: Stuart Freedman

2003: The NHS newborn hearing screening programme is rolled out across Wales after heavy RNID campaigning. Within three years, it is also introduced in England, Scotland and Northern Ireland. Photograph: Stuart Freedman

2005: The RNID telephone hearing check is launched. It is an immediate success, with 40,000 checks on the first day. Photograph: Kim Cunningham

2008: The BBC commits to subtitling all of its programmes on the back of a major RNID campaign. Within three years, all major channels follow suit. Photograph: Philip Meech

2010: RNID launches the first of 21 hear to help projects, showing people in their own communities how to get the best performance from their NHS hearing aids. Photograph: Kim Cunningham

2011: RNID becomes Action on Hearing Loss. Photograph: RNID