Visitors using telesonic lorgnettes, Science Museum, London, 1961.
© Science Museum / Science & Society Picture Library
Museum visitors looking at a Bessemer converter, using a hand-held radio receiver and earphone intended for receiving signals from a low-powered transmitter. They were used experimentally at the Science Museum in 1961 for providing personal audio commentaries in the Museum's galleries. The telesonic lorgnettes were made by A&M Hearing Aids Ltd.