Creating a 1/3 Octave Graph from Collected Sound Pressure Data

[11gg]

Hello, 

I was wondering if it is possible to create a 1/3 Octave band graph from previously collected sound pressure data. I managed to import my collected data into Labview using the "Read Delimited Spreadsheet VI". I have tried using the "SVPO Scale Voltage to EU VI" coupled with the "SVT Third-Octave Analysis VI" with my collected sound pressure data as the signal input but no Band Power Data is generated.

Please forgive me if I have made an obvious mistake. I have used Labview in the past but this type of analysis is fairly new to me. Any help from the community is greatly appreciated. I am using labview 2017.

Best Regards

[LocalDSP]

Do you get any error along your processing chain?

If you converted your spreadsheet data to a waveform (Wfm), have you checked that you got the correct dt value (1 / sample rate)?

Have you probed your data to verify its presence and validity where it is expected?

Any chance you could post your VI with associated data?

[11gg · Accepted solution]

Hi LocalDSP

Thanks for responding to my question. I did not get an error message. It ran without issue and it was only plotting the first recorded data point in the series. I managed to find a solution on my own by saving the recorded data as a .wav file and saving the file in the Labview wave file directory. Using the "get wave" VI, I was able to successfully import all the recorded data. I was able to perform the desired sound metrics as a result.

The take away from this is to convert the recorded data into a .wav file. Importing raw data straight into the VI will not work in this scenario.