GearCast - Glossary Definition for Cutoff Frequency

Definition for Cutoff Frequency

The filter frequencyDefinition:
A value, expressed in Hertz, that indicates how many cycles of a periodic signal occur in one second. where the response is down 3 dBDefinition:
1. A deciBel is a logarithmic ratio between two quantities, and is a nonlinear measurement that mimics human perception. 2. A unit expressing sound levels relative to a nominal level just audible by the average human ear, and equal to 1/10th of a Bel. compared to the frequency (or range of frequencies) where response is at maximum. With a lowpass filter, frequencies above the cutoff frequencyDefinition:
The filter frequency where the response is down 3 dB compared to the frequency (or range of frequencies) where response is at maximum. With a lowpass filter, frequencies above the cutoff frequency become progressively more attenuated. With a highpass filter, the same is true for frequencies below the cutoff frequency. become progressively more attenuated. With a highpass filter, the same is true for frequencies below the cutoff frequency.