Hello,
I'm sorry to hear that you are having such a problem.
Could you please try to visit on this test page:
https://permission.site/ and click on the `Microphone` button?
If the result is not a green button, please try to reset your permissions by clicking on the icon in the search field
View site information and then click on `Site settings`.
After that, click on the `Reset permissions` button on the page. This should reset all changes/permissions on the site.
Now refresh the page with
https://permission.site/ and click the `Microphone` button again
The Permissions popup should be shown, and allowing it should make the microphone work.
The `Microphone` button should turn green, and an indication of using the microphone should be visible by a blinking icon on the tab.
If this is working, try to reset permissions the same way on your desired webpage.