getBandedgeFrequencies

Get filter bandedges

Syntax

bandEdges = getBandedgeFrequencies(obj)

[bandEdges,centerFrequencies] = getBandedgeFrequencies(obj)

Description

bandEdges = getBandedgeFrequencies(obj) returns the bandedge frequencies of the filters designed by obj. If there are M filters, then there are M center frequencies and M+1 band edge frequencies.

[bandEdges,centerFrequencies] = getBandedgeFrequencies(obj) returns the center frequencies of the filters designed by obj.

Examples

Get Bandedge Frequencies

Create a default octaveFilterBank object.

octFiltBank = octaveFilterBank;

Call getBandedgeFrequencies to return a vector of bandedge frequencies.

bE = getBandedgeFrequencies(octFiltBank)

bE = 1×11
104 ×

    0.0022    0.0045    0.0089    0.0178    0.0355    0.0708    0.1413    0.2818    0.5623    1.1220    2.2050

Call freqz to get the frequency response of the filter bank. Plot the magnitude frequency response. Use the bandedge frequencies to label the frequency axis.

[H,f] = freqz(octFiltBank);
semilogx(f,abs(H))
xticks(round(bE))
xlabel('Frequency (Hz)')
ylabel('Magnitude')
grid on
h = gcf;
set(h,'Position',[h.Position(1) h.Position(2) h.Position(3)*2 h.Position(4)])

Input Arguments

obj — Object to get filter information from

octaveFilterBank object

Object to get filter information from, specified as an object of octaveFilterBank.

Output Arguments

bandEdges — Bandedges of filters (Hz)

row vector

Bandedges of filters designed by obj in Hz, returned as a row vector.

Data Types: double | single

centerFrequencies — Center frequencies of filters (Hz)

row vector

Center frequencies of filters designed by obj in Hz, returned as a row vector.

Data Types: double | single

Version History

Introduced in R2019a