// todo need optimize like in event.jsp. Add indexing or not indexing this page. Voice recording, used as evidence (1960s) (18 janv. 1960 – 31 juill. 2005) (La bande de temps)

Voice recording, used as evidence (1960s) (18 janv. 1960 – 31 juill. 2005)

Description:

A sound spectrograph discovered to be able to record voices. Voiceprints began to be used in investigations and as court evidence from recordings of phones, answering machines, or tape recorders.