electrophonic effect वाक्य
"electrophonic effect" हिंदी में electrophonic effect in a sentenceउदाहरण वाक्य
- Antonio Meucci invented the first device that allowed the electrical transmission of voice over a line in 1849 . However Meucci's device was of little practical value because it relied upon the electrophonic effect and thus required users to place the receiver in their mouth to " hear " what was being said.