The frequency either above which or below which the output of a circuit, such as a line, amplifier, or filter, is reduced to a specified level. 2. The frequency below which a radio wave fails to penetrate a layer of the ionosphere at the incidence angle required for transmission between two specified points by reflection from the layer.

The upper or lower frequency beyond which no appreciable energy is transmitted.

The frequency at which the gain of a filter is at an edge of a band, usually taken to be when gain is 0.5, or -3.01dB; the frequency at which the output of a filter is half the power of the input; See Also: band-pass filter, high-pass filter, low-pass filter; Symbols: omega sub c; Typical Units: rad/s,Hz; Dimensions: 1/Time;

  In audio filtering, the point at which a filter begins to omit a prescribed frequency range.

The frequency at which the gain of a filter is at an edge of a band, usually taken to be when gain is 0.5, or -3.01dB; the frequency at which the output of a filter is half the power of the input; See [..]

Normally defined as the frequency where the output from a filter has fallen by 3dB from the maximum level obtainable through the filter

Normally defined as the frequency where the output from a filter has fallen by 3dB from the maximum level obtainable through the filter.

frequency where an item stops working due to overload.

A point where higher frequency cycles will not pass through a filter (e.g., a 10-day SMA will eliminate cycles of 20 days or less).

The 3dB point of a filter at which point the filter starts to attenuate the signal. The frequency either above which or below which the output of a circuit, such as a line, amplifier, or filter, is re [..]