Does anyone know (or have an IBASIC program) how to average the sound power/pressure using a HP35670A Digital Signal Analyzer? I am testing the acoustics of a vacuum cleaner using 9 different microphone positions. Now I need to average them all out to provide a single sine graph. Has someone already written an IBASIC program to do this? If not does anyone know how to go about doing this? And with what program?
Thank you.
John
5/24/2010
Thank you.
John
5/24/2010
The 35670A is capable of making sound pressure level (SPL) measurements. For your specific application, I can suggest a manual procedure. This procedure would entail gathering the 9 SPL traces in a waterfall display; then saving the waterfall trace to a file in the ASCII format and then doing post processing on the file to compute the average.
Here are the steps:
1) Set the Trigger to be "free run" (Trigger > Free Run)
2) Set the Average to Linear (Avg > Linear) and Repeat to Off (Avg > Repeat > Off)
3) Turn on the waterfall display (Disp Format > Waterfall setup > Waterfall Steps > 9 and then Waterfall > On)
4)Now, when you are ready to make measurement at the 1st location, push Start. Measurement starts and after the integration time has elapsed, it pauses. Now, when you are ready to make measurement at the 2nd location, push Pause/Cont. A new trace gets added to the waterfall display. Continue this process until you have 9 traces in the waterfall display.
5) Save the waterfall display to a file (Save > Save Data > Format > ASCII then Save Waterfall)
Hope this helps!