g.Preprocessing.Preprocessing.notch" title="Permalink to this definition">¶</a></dt>
<dd><p>The notch function applies a notch filter in order to remove the power line artefacts.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>n_freq</strong> – The expected center frequency of the power line interference. Typically, 50Hz (e.g. Europe) or 60Hz (e.g. US)</p>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><p>The filtered ECG signal,