Charles Wheatstone

Experimenter English, was committed by a merchant of musical instruments until the publication in 1823, curious experiences on the sound. It also interested resonance column of air, the transmission of sound in solid conductors and linear (1831) and built a machine speaker.

In 1834 he was appointed professor at King's College, London, but leaves the chair after a few years. In 1834 publish its experiences in the electrical field. In 1837 he exhibited in the Quarterly Journal of Science the  experiences on sound and the description of an ingenious device, the noise calendoscopio becoming the first source for the optical sound. Year following the stereoscope invented, perfected by Brewster. In February 1838  in  London he filed the patent of telegraph, after dedicating his improvement and possible applications. Finally in 1869 invented a device used to measure with precision the resistance known as BRIDGE OF WHEATSTONE.