Audio filters remove some frequencies from a signal while letting other frequencies pass unaltered. Three common types of filters are high-pass, low-pass, and band-pass filters.
High-Pass Filter (HPF)
A high-pass filter is used to reduce the amplitude of an audio signal below a specified frequency while allowing higher frequencies to pass through. For example, a high pass filter may be used to remove low frequency wind noise in a recording. High-pass filters are sometimes called low-cut filters.
Low-Pass Filter (LPF)
A low-pass filter is used to reduce the amplitude of an audio signal above a specified frequency while allowing lower frequencies to pass through. For example, a low-pass filter may be used to remove high frequency noise in a recording. Low-pass filters are sometimes called high-cut filters. Low-pass filters are often used in recording systems to prevent aliasing.
Band-Pass Filter (BPF)
A band-pass filter is like a combination of a high-pass filter and a low-pass filter, only allowing signals between two specified frequencies to pass through.
In the spirit of reconciliation, Faunatech acknowledges the Traditional Custodians of Country throughout Australia and their connections to land, sea and community. We pay our respect to Elders past and present and extend that respect to all Aboriginal and Torres Strait Islander peoples today.