Caroline Martel (born 1973) is a French Canadian documentary filmmaker from Montreal, Canada.
The film's topic has not garnered widespread attention, the history of the telephone was more documented than those who operated the lines.
Martel states this as a reason for her creation of the film, referring to these the operator as the "Unseen Voice".
[6] The film is narrated by Pascale Montpetit in a spectral tone, aiming to act as a voice for these operators.
[10] The documentary directed by Martel explores the history of the instrument and it's creator Maurice Martenot.