Magnitude attenuation by a filter

1. What is the attenuation of a filter?
2. What is the magnitude response of a filter?
3. How do you plot the magnitude of a filter?
4. What is magnitude and phase response?

What is the attenuation of a filter?

Attenuation Rate.

A high attenuation rate helps a filter distinguish between signals of similar frequency and is usually a desirable feature. The attenuation rate is also related to the order of a filter. For a low-pass or a high-pass filter, the attenuation rate will be –20 times the filter's order, in dB/decade.

What is the magnitude response of a filter?

The magnitude response of filters can be characterized in terms of the frequency bands the filter will pass or reject. In Fig. 4.9 the ideal magnitude responses of the four most frequently used filter types are illustrated as a function of ω in radians per second.

How do you plot the magnitude of a filter?

Take the products of the line length originating from a zero and divide by the product of the line length originating from a poles. You'll get the magnitude response of your filter.

What is magnitude and phase response?

The minimal-phase response can be calculated from the amplitude response by using the Hilbert transform. The figure above shows the magnitude response of the complex transfer function between loudspeaker terminals and sound pressure at a point on axis in 1 m distance measured by TRF module using a shaped stimulus.