Title: Who Invented The Telephone? The Complete Truth - RankRed
Headings: Who Invented The Telephone? The Complete Truth
Who Invented The Telephone? The Complete Truth
Antonio Meucci
Constructed an early voice communicating device in 1854
Johann Philipp Reis
Built the first ‘make-and-break’ telephone in 1861
Innocenzo Manzetti
Reported to have invented a speaking-telegraph in 1864
Elisha Gray
Designed a telephone using a water microphone in 1876
Alexander Graham Bell
Awarded the first US Patent for the invention of the practical telephone in 1876
Thomas Edison
Invented the carbon microphone to produce a strong telephone signal
Tivadar Puskás
Proposed the telephone switchboard exchange in 1876
Varun Kumar

Content: It contained two metal plates isolated by carbon granules. These granules alter resistance with the soundwaves’ pressure. When a direct current (DC) is passed between the plates through the granules, the varying resistance creates a varying current, which further produces the varying pressure of the soundwave. Since carbon microphones could generate high-level audio signals from very low DC voltages, without any additional amplification, they were widely used in telephones along with the Bell receiver from 1890 until the 1980s. According to Edison,
The first inventor of a telephone was Phillip Reis but his device could only transmit music (not speech). The first person to publicly demonstrate a telephone for transmitting articulate speech was Graham Bell. The first commercial telephone (that could transmit articulate speech) was invented by him only. His invention is used for transmitting while Bell’s is used for receiving. Read: Who Actually Invented The Light Bulb?