In the context of signal processing and communication systems, a **stopband** refers to a range of frequencies that are attenuated or blocked by a filter. This is a critical concept in the design of various types of filters, including low-pass, high-pass, band-pass, and band-stop filters. ### Key Points about Stopband: 1. **Frequency Response**: The stopband is characterized by a frequency response where the amplitude of the output signal is significantly reduced or near zero.
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