| 摘要 |
1384721 Displaying speech characteristics DEKTOR COUNTERINTELLIGENCE & SECURITY Inc 18 Jan 1972 [9 Feb 1971] 2438/72 Heading H4R In an apparatus, Fig. 5 (not shown), for displaying characteristics of speech in order to obtain indications of psychological stress, e.g. lie detecting, the speech is filtered (22) and its frequency detected (23), the resulting signals are integrated (25) and very low frequency variations are displayed (27), e.g. on a chart recorder. In an alternative arrangement the speech is recorded, and replayed, if required at a reduced speed, and the recorder output detected and the resulting waveform displayed, Fig. 6 (not shown). The detector reservoir capacitor can be changeable to allow modification of the display. |
