Octave analysis

[saraswathi]

Hi all,

Now i am doing the octave analysis for voice signal.

I have the total band power. But i need the band power for individual
bands.

Can u help me?

Thanks in advance

[Elijah_K]

I'd be more than happy to help you out, but I'll need a little more information first.

When you say that you need the 'band power for the individual bands' are you looking for the magnitude of the signal at various frequencies?  If this is the case you could use any of the various fast fourier transform VIs, including the FFT Express VI. 
I'd recommend investigating the 'Waveform Measurements' palette for various options.  Check out the contextual help (CTRL + h) for extra info when browsing the palettes.

Octave analysis VIs are available in the sound and vibration toolkit, which provide a range of functionality, including:

-Octave Analysis: Performs an octave analysis on scaled signal [EU] in accordance with the IEC 1260:1995 and ANSI S1.11-2004 standards. You can use this polymorphic VI to perform octave analysis on a single channel or on N channels. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use.

-Fractional Octave Analysis: Performs a fractional-octave analysis on scaled signal [EU] in accordance with the IEC 1260:1995 and ANSI S1.11-2004 standards. You can use this polymorphic VI to perform fractional-octave analysis on a single channel or on N channels. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use.

-Third-Octave Analysis: Performs a third-octave analysis on scaled signal [EU] in accordance with the IEC 1260:1995 and ANSI S1.11-2004 standards. You can use this polymorphic VI to perform third-octave analysis on a single channel or on N channels. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use.

-Octave: Performs fractional-octave analysis, including 1/1, 1/3, 1/6, 1/12, and 1/24 octave for a single channel or N channels.

If you have questions about using these VIs I'd recommend using the contextual help, the Example Finder, or the LabVIEW help file, but I'll be more than happy to answer any of your questions, and perhaps with a little more information I can help point you to the appropriate VI.