A la poursuite de la trace du signal de parole
Bernard Teston.

At the beginning of the nineteenth century, the linguists, physiologists and acoustics experts had only one goal: to make the speech visible to be able to study its nature and its structure. Many scientists and inventors then will often launch out to the continuation of the speech signal with very varied but not very effective techniques, during meadows of a siécle. However, these sometimes curious devices will allow the researchers of this time to make fundamental discoveries on which our speech domain is founded.