I’ve got a duvet behind me and a sound absorber around the front area of the mic. The strange thing is that the weird sound is present in Adobe Audition and the built-in Windows Recorder, but not in the Sound Card’s configuration app, which allows you to test the mic.
I have no effects enabled in Audition. Also as this issue is occurring in Windows Sound Recorder, which doesn’t have effects within it, I don’t think it’s an effect. Could it be that the sound card is outputting the sound incorrectly? Or adding some sort of corruption to it?