Impulse respanse does not look right, please help

[Foly83]

I had a Macbook before, I never had such an image.
Now with my Windows computer, such jaggies appear in the measurement image.
Have any of you had this before?
Is it maybe a driver, sound card, setup problem?
All measurements are made with the UMIK and have the same volume.

Would be happy if there was a simple explanation for this, which I do not see
Maybe I also made a mistake, please help

I also upload the measurement

greetings Alex

 

[John Mulcahy]

The noisy measurements were made from 20 Hz to 20 kHz, the cleaner measurements 20 Hz to 300 Hz. The shorter frequency span means more time (and energy) is spent within the range the sub has a response, the longer span means less time in the range where the sub has output and much of the measurement is just background noise as the sub can't produce anything at those frequencies.

 

[Foly83]

Thank you very much John.
I have concentrated so also the "noise".
That I have not noticed the measurement length at all

Greetings
Alex