Split and merge into it. Answered by The Community. Making the world better, one answer at a time. The telephone has changed design over time but the machine part still works the same, the sound gives off waves that travel into the mouthpiece where the transmitter copies the sound waves identically.ow the Telephone Has Changed Over Time We type in the numbers instead of using the dial circle. The look has changed. We can call long distance. No cords! Much smaller. Mor … e technology. You can also put people on speed dial.