“How can we transmit information through signals across long distances?”
Audio signals are great for transmitting information from one place to another. However, they lack the ability to travel far. So how can we get around this problem? Well, radio frequencies happen to be very capable of traveling great distances. So why don’t we merge our audio frequency Modulation Signal with a radio frequency Carrier Wave to get a new, information-rich, distance capable Modulated-Carrier Signal? This is the idea behind Modulation and is one of the most fundamental parts of radio transmissions.