Efficient scrambling techniques for speech signals/

Ижил төстэй зүйлс

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  -н: 333795 Philips V. J., зэрэг
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• Voice scrambling /
  -н: 289301 Nai, Choon Siang
  Хэвлэсэн: (1999)
• Measuring security in analog speech communications security devices /
  -н: 441017 McCalmont, Arnold M.