Trivia: What precursor to the telephone was invented in 1667?
Speaking Tube
Megaphone
Telegram
String Telephone
The correct answer is String Telephone
So why is this answer correct? : Most children are familiar with the tin-can telephone, or two cans joined by a piece of string. When you speak into one can, your voice can be clearly heard by the person holding the other can. This simple toy was once a major scientific discovery; inventor Robert Hooke’s String Telephone was a breakthrough in understanding how sound is transmitted.