.0                          10                                 20                          30            kHz         40
.0                         100                               200                        300           kHz       400
.0                           1                                   2                            3             kHz          4
.1 2    5          10         15          20      25         30          35         40         45   kHz  50
.0                            5                              10                                     kHz                  20
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. |  |     |              |           |              |          |            |             |            |             |             |
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