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getCenterFrequency

Get center frequency

Description

example

CF = getCenterFrequency(npFilter) returns the center frequency of the notch peak filter. If the Specification property is set to 'Coefficients', the center frequency is determined from the CenterFrequencyCoefficient value and the sample rate.

Examples

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Create a dsp.NotchPeakFilter object with the Specification property set to 'Coefficients'.

np = dsp.NotchPeakFilter('Specification','Coefficients')
np = 
  dsp.NotchPeakFilter with properties:

                 Specification: 'Coefficients'
          BandwidthCoefficient: 0.7265
    CenterFrequencyCoefficient: 0
                    SampleRate: 44100

Determine the center frequency of the notch peak filter using the getCenterFrequency function. When the Specification is set to 'Coefficients', the center frequency is determined from the CenterFrequencyCoefficient value and the sample rate.

getCenterFrequency(np)
ans = 11025

Visualize the filter response using fvtool.

fvtool(np)

Figure Filter Visualization Tool - Magnitude Response (dB) contains an axes and other objects of type uitoolbar, uimenu. The axes with title Magnitude Response (dB) contains an object of type line.

Input Arguments

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Notch peak filter whose center frequency is measured, specified as dsp.NotchPeakFilter object.

Output Arguments

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Center frequency of the filter, returned as a scalar.

Data Types: double

Introduced in R2014a