Which invention by Thomas Edison significantly improved the clarity and distance of telephone calls?
Answer
The carbon microphone
While the initial telephone patent established the fundamental principle of transmitting voice via a variable electric current, it did not perfect the clarity or distance of the sound. Thomas Edison later developed the carbon microphone, which became a crucial refinement for the device. This improvement significantly enhanced the quality of the transmitted sound, allowing for reliable communication over much longer distances than the original experimental devices.
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