Звуков анализ - http://bglog.net/ClientFiles/be8cde0e-fffd-4f71-b9f4-692c7974493d/%D0%97%D0%B2%D1%83%D0%BA%D0%BE%D0%B2%20%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7%20%D0%BD%D0%B0%20%D0%B4%D1%83%D0%BC%D0%B8%D1%82%D0%B5.ppt
