Tough situation.
There is a law regarding sermons on loudspeakers(they are not allowed), but not for the Azaan itself.
Although there might a be law regarding how close a mosque can be to a residency.
I would suggest to you go talk to the head of the mosque and request in a polite way that the speakers be turned in a different direction.
@All: Please don't turn this thread into a religious debate.Thank you.