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Octave Analysis

Description#

The signal processing block Octave Analysis octave averages individual 1/B octave bands of an input. The octave analyser is designed based on IEC 61260-1:2014 and the specifications in the attributes. The octave filters are class 1 which is the best filter class

tip

If you want to use octave filters go here.

MxNKxN

Input#

The input is MxN.

Output#

The output is KxN which is the average of each K 1/B octave band of the input signal MxN. The size K is dependent on how many bands pr octave and the start and end frequency.

Attributes#

AttributeValue
NameOctaveAnalysis
Bands pr. octave3
Start frequency20 Hz
Stop frequency20.000 Hz
Base10
Reference frequency1000 Hz
Channels1

Name#

Name specifies the name of the block.

Bands pr. octave#

Bands pr. octave is the number of bands pr. octave. Maximum is 24 bands pr. octave.

Start frequency#

Start frequency is the frequency which the lowest octave band must contain.

Stop frequency#

Stop frequency is the frequency which the highest octave band must contain.

Base#

Base is a design parameter which can either be 10 or 2. For default standard octave filters it is 10.

Reference frequency#

Reference frequency is a design parameters. For default standard octave filters it is 1000 Hz

Examples#

This example shows a 1/3 octave analysis of a summed white noise and a 1000 Hz tone.

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