optophone


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optophone

(ˈɒptəˌfəʊn)
n
(Electrical Engineering) a device for blind people that converts printed words into sounds

optophone

a device combining a selenium cell and telephone apparatus that converts light energy into sound energy, used to enable blind people to sense light through the hearing and thus read printed matter.
See also: Blindness
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References in periodicals archive ?
The photoconductivity of selenium found its use in a photometer by Siemens, 1875, a photophone by Graham Bell, 1880, an optophone by Fourniere d'Albe, 1912 and then talking films in 1921 [61].