who is credited with discovering how to transmit sound without the use of wires
Wireless telegraphy US inventors William Henry Ward (1871) and Mahlon Loomis (1872) developed an electrical conduction systems based on the erroneous belief that there was an electrified atmospheric stratum accessible at low altitude.[7][8] They thought atmosphere current, connected with a return path using "Earth currents"' would allow for wireless telegraphy as well as supply power for the telegraph, doing away with artificial batteries.[9][10] A more practical demonstration of wireless transmission via conduction came in Amos Dolbear's 1879 magneto electric telephone that used ground conduction to transmit over a distance of a quarter of a mile.[11]
Models of communication The Shannon–Weaver model was designed to mirror the functioning of radio and telephone technology. Their initial model consisted of four primary parts: sender, message, channel, and receiver.The sender was the part of a telephone a person speaks into, the channel was the telephone itself, and the receiver was the part of the phone through which one can hear the person on the other end of the line. Shannon and Weaver also recognized that there may often be static or background sounds that interfere with the process of the other partner in a telephone conversation; they referred to this as noise. Certain types of background sounds can also indicate the absence of a signal.[1]