Do any of the Spectral Measurement VI's allow for 20 microPa dB reference value

[rluken]

I want to show a Sound Pressure Level FFT in dB, where the reference should be 20E-06 Pa.  All of the Spectral Measurement VI's that I can find use a dB reference of 1.0.  Do any of the Spectral Measurement VI's allow for a 20E-06 Pa reference?  I do have the Sound and Vibration Toolkit.  Thank you.

Rick

[Ben_S · Accepted solution]

In the Sound and Vibration Toolkit there is a VI called Set dB Reference.  This VI will set the dB referenc for your data for you or you can take a look at how that VI changes the attributes of the waveform and impliment the scaling on your own. Once your data's dB reference is set correctly the FFT VIs should display the data in respect to that property.

[rluken]

Ben,

Thanks for the help!

Rick

[jjlin]

How 20 microPa dB reference can be set for Labview signal Express?

[Che_T.]

Hi jjlin,

The Sound and Vibration Toolkit is available for LabVIEW, and it isn't compatible with SignalExpress.  However, the function that was referenced in this thread, SVL Set DB Reference, gives the formula that it uses to scale the results.  You could create your own scale based on that formula.

Hope this helps.

Regards