// todo need optimize like in event.jsp. Add indexing or not indexing this page. Voice recording, used as evidence (1960s) (18 Jan 1960 Jahr – 31 Jul 2005 Jahr) (Band der Zeit)

Voice recording, used as evidence (1960s) (18 Jan 1960 Jahr – 31 Jul 2005 Jahr)

Beschreibung:

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.