If you use a high pass filter and a low pass filter in conjunction, they result in what is called a band pass filter (BPF). You will also see these filters abbreviated as HPF or LPF, respectively. This is why they are sometimes referred to as high cut filters. Conversely, low pass filters allow low frequencies to pass, unaffected, while cutting high frequencies above the cutoff frequency. This is why they are sometimes referred to as low cut filters. High pass filters, as the name suggests, allow high frequencies to pass, unaffected, while eliminating (or 'cutting') low frequencies below the cutoff frequency. The names of these filters can sometimes cause confusion for new users, so let's take a moment to clarify some vocabulary. The amount of reduction is expressed in dB per octave (dB/oct). High and low pass filters are always subtractive, allowing us to reduce the energy above or below a given frequency (the cutoff frequency).
0 Comments
Leave a Reply. |