(n.) An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.
RADIOPHONE
Meaning of RADIOPHONE in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.
Webster's English dictionary. Английский словарь Webster. 2012