Nowadays everywhere, even in small villages, the adhan is broadcasted by microphones. A group of people /Turkish scholars/ say this is bidah and forbidden. They say that when the new technologies came, such as microphones, the scholars in many places went against using microphones. Such people say that it's said in Fatawa hindiyya that even if the muazzin calls and then someone hears the echo /if this is in the mountain/ then the echo is not considered to be adhan. Please discuss this.