Problems with apple aux to lightning dongle

Hi,

im trying to use my headphones (beyerdynamic dt 990 pro, 250 ohm) with the Apple aux to Lightning dongle.

but everytime i connect the headphones to the phone, my Voice Control is activated. I have voice control disabled in the settings.

i also notice loud cracking and white noise.

Im running an iPhone 11 with ios 16.4.1 and the dongle is new.

looking forward to helpful answers. :)

Felix