Search Results for: Earphones with microphone
disappointment of the sensitive young teacher. [ ] reis, like bell would later do, had studied the organs of ear and the idea of an apparatus for transmitting sound by means of electricity had floated on his mind for years. inspired by his physics lessons he attacked the problem, and was rewarded with
success. in , he constructed the first prototype of a telephone , which could cover a distance of meters. in , he again tried to interest poggendorff with an account of his "telephon", as he called it. [ ] his second offering was also rejected, like the first. the learned professor, it seems, regarded...
https://en.wikipedia.org/wiki/Johann_Philipp_Reis