Bandpass filter

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Band-pass filter "passes" (preserves) a certain range of frequencies (that is, a band), while removing everything else.

Figure: Here only 1 band - frequencies between 5-10kHz are passed.

Band-pass filters are used e.g in MP3 encoder filterbank, which used band-pass filters to divide the whole frequency range (full Bandwidth) into 32 subbands which can be then processed separately.