This term applies to the frequency of a pure tone and is the number of cycles of sinusoidal pressure variant occurring in one second. Measured in Hertz. See sound spectrum.
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This term applies to the frequency of a pure tone and is the number of cycles of sinusoidal pressure variant occurring in one second. Measured in Hertz. See sound spectrum.
ID, 'custom_sentence', true); if (!empty($custom_sentence)) { ?>