[xx9000]

Hi guys! I have to transfer the pressure data in time domain but I have an issue. So, I have 149999 data of pressure versus time , which is discrete data. I also have a frequency versus SPL data, which has 206 in number. i want to sampling that pressure data with 3kHz low-pass filter, which have same number of data with the latter data, with which i can compare it with the frequency data. I need to do the spectra analysis of the CFD result, so I have transferred time to frequency. After I transferred the time domain into frequency, then calculate the sound pressure level, but there is a difference between the CFD and experiment result- of 60db. Can someone pls help me identify why there is this difference of 60db because i have no idea about it... Thanks in advance. If you can offer any sort of advise or guidance - DM me or comment here, if you don't mind having a look at the data real quick