Иллюстрации:
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 431-451-3.jpg:1239x309, 129k |
 435-440-beates_440hz.gif:1103x390, 26k |
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 435-440-hibeat.jpg:1018x597, 100k |
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 440-450-loud-spectr.jpg:470x980, 105k |
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 450-hz-sync-tone-spectr.jpg:488x930, 100k |
 450-hz-sync-tone-spectr2.jpg:522x969, 112k |
 clin.jpg:727x404, 60k |
 clinb.jpg:990x914, 155k |
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 halfbeat_1.jpg:1280x764, 196k |
 pics.jpg:960x600, 116k |
 pics1.jpg:1024x544, 61k |
 sin.jpg:900x996, 82k |