부산대학교 도서관

One of the most frequently encountered auxiliary technical devices installed in a protected room is a telephone that created acoustoelectric leakage channels of the acoustic speech information. In the NI Multisim simulation environment, typical models of passive telephone protection devices have been designed. The device protects a telephone set of the speech information leakage arising from the acoustoelectric effect and «high-frequency injection». The study was carried out of the main characteristics of the developed protection device and an assessment of the performance when connected to a telephone network using the virtual laboratory bench.