TS parameters - error message

[Gavin49]

While trying to use the TS parameter calculation function, I received the following error message.

There is not enough high frequency data to estimate the blocked impedance parameters, need data to at least 95,999Hz, ideally beyond 383,994Hz for accurate results.

My measurement is 0 to 24KHz with a sampling frequency of 48KHz. I initially ran the test using REW_windows-x32_5_20_beta_33 but after receiving the error, I upgraded to beta 41 with no change in the result.

I used the added mass method and took several sets of measurements that resulted in the same error message when trying to run the TS calculation.

Did I find a bug or is my measurement data invalid?

 

[John Mulcahy]

Can you attach the mdat file with your measurements, Gavin?

 

[John Mulcahy]

I suspect from the message there is some bad behaviour at the very end of your sweep, so try measuring to 20 kHz.

 

[Gavin49]

Thanks for the quick feedback, John.

The anti-aliasing filter is of course visible at the top end of the sweep. I incorrectly assumed REW would discard that filter data.

Measuring to 20KHz with a 24KHz bandwidth resolved the issue. Thanks!

 

[John Mulcahy]

The problem was in the min search, I have fixed it for the next build. Which drive unit is that?