Notice that won’t disappear or be quiet.

Since I logged in with my Apple Id on my new Mac Book PRO device, the microphone in my IPhone want’s to connect to my Mac Book all the time! And I get constant notices every 30 seconds that ”the microphone of ”iPhone (123)” is not available, with a loud noice that won’t stop unless I make the speaker all quiet. I have tried to stop the notices in the system app, and ”sound” but I can’t find the right button for it to stop. I also went to microphone settings but nothing could stop it.